Here is the iPhone 13 mini, iPhone 13, iPhone 13 Pro, and iPhone 13 Pro Max availability for the early afternoon of September 29th, 2021. There have been a ton of changes for both Apple and the carriers.
For Apple, all of the iPhone 13 models have slipped a week and the iPhone 13 Pro and iPhone 13 Pro Max models have all slipped to November 1st - November 8th.
All of Verizon's phones have slipped a week to October 22nd. A lot of AT&T's have slipped in days as well.
Changes for Apple
iPhone 13
	- 128GB - Pink  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 256GB - Pink  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 512GB - Pink  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 128GB - Blue  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 256GB - Blue  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 512GB - Blue  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 128GB - Midnight  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 256GB - Midnight  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 512GB - Midnight  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 128GB - Starlight  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 256GB - Starlight  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 512GB - Starlight  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 128GB - PRODUCT(RED)  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 256GB - PRODUCT(RED)  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
- 512GB - PRODUCT(RED)  has changed from Oct 15 - Oct 20 to Oct 20 - Oct 25
iPhone 13 Pro
	- 128GB - Sierra Blue  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 256GB - Sierra Blue  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 512GB - Sierra Blue  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 1TB - Sierra Blue  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 128GB - Silver  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 256GB - Silver  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 512GB - Silver  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 1TB - Silver  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 128GB - Gold  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 256GB - Gold  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 512GB - Gold  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 1TB - Gold  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 128GB - Graphite  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 256GB - Graphite  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 512GB - Graphite  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 1TB - Graphite  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
iPhone 13 Pro Max
	- 128GB - Sierra Blue  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 256GB - Sierra Blue  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 512GB - Sierra Blue  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 1TB - Sierra Blue  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 128GB - Silver  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 256GB - Silver  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 512GB - Silver  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 1TB - Silver  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 128GB - Gold  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 256GB - Gold  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 512GB - Gold  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 1TB - Gold  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 128GB - Graphite  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 256GB - Graphite  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 512GB - Graphite  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
- 1TB - Graphite  has changed from Oct 27 - Nov 3 to Nov 1 - Nov 8
Changes for the Carriers
AT&T
	- iPhone 13 mini - 128GB - Pink has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 mini - 256GB - Pink has changed from Oct 01 - Oct 05 to Dec 31
- iPhone 13 mini - 512GB - Pink has changed from Oct 01 - Oct 05 to Oct 11 - Oct 18
- iPhone 13 mini - 128GB - Blue has changed from Dec 31 to Oct 14 - Oct 21
- iPhone 13 mini - 256GB - Blue has changed from Dec 31 to Oct 14 - Oct 21
- iPhone 13 mini - 128GB - Midnight has changed from Oct 05 - Oct 07 to Dec 31
- iPhone 13 mini - 256GB - Midnight has changed from Dec 31 to Oct 14 - Oct 21
- iPhone 13 mini - 128GB - Starlight has changed from Oct 01 - Oct 05 to Oct 06 - Oct 08
- iPhone 13 mini - 256GB - Starlight has changed from Oct 01 - Oct 05 to Oct 11 - Oct 18
- iPhone 13 mini - 512GB - Starlight has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 mini - 128GB - PRODUCT(RED) has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 mini - 256GB - PRODUCT(RED) has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 128GB - Pink has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 256GB - Pink has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 512GB - Pink has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 128GB - Blue has changed from Oct 01 - Oct 05 to Oct 11 - Oct 18
- iPhone 13 - 256GB - Blue has changed from Oct 06 - Oct 13 to Oct 08 - Oct 15
- iPhone 13 - 512GB - Blue has changed from Oct 01 - Oct 05 to Dec 31
- iPhone 13 - 128GB - Midnight has changed from Oct 05 - Oct 07 to Oct 11 - Oct 18
- iPhone 13 - 256GB - Midnight has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 512GB - Midnight has changed from Dec 31 to Oct 14 - Oct 21
- iPhone 13 - 128GB - Starlight has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 256GB - Starlight has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 512GB - Starlight has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 128GB - PRODUCT(RED) has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 256GB - PRODUCT(RED) has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 - 512GB - PRODUCT(RED) has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 Pro - 256GB - Sierra Blue has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 Pro - 512GB - Sierra Blue has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
- iPhone 13 Pro - 512GB - Gold has changed from Oct 01 - Oct 05 to Oct 06 - Oct 08
- iPhone 13 Pro Max - 256GB - Gold has changed from Oct 01 - Oct 05 to Oct 04 - Oct 06
T-Mobile
	- iPhone 13 Pro - 512GB - Gold has changed from Sep 28 - Oct 01 to Oct 14 - Oct 28
Verizon
	- All models have changed from Oct 15 to Oct 22
iPhone 13 mini
	
		
			| Sim-Free | 128GB | 256GB | 512GB | 
	
	
		
			| Pink | Oct 12 - Oct 15 | Oct 12 - Oct 15 | Oct 12 - Oct 15 | 
		
			| Blue | Oct 12 - Oct 15 | Oct 12 - Oct 15 | Oct 12 - Oct 15 | 
		
			| Midnight | Oct 12 - Oct 15 | Oct 12 - Oct 15 | Oct 12 - Oct 15 | 
		
			| Starlight | Oct 12 - Oct 15 | Oct 12 - Oct 15 | Oct 12 - Oct 15 | 
		
			| PRODUCT(RED) | Oct 12 - Oct 15 | Oct 12 - Oct 15 | Oct 12 - Oct 15 | 
	
iPhone 13
	
		
			| Sim-Free | 128GB | 256GB | 512GB | 
	
	
		
			| Pink | Oct 20 - Oct 25 | Oct 20 - Oct 25 | Oct 20 - Oct 25 | 
		
			| Blue | Oct 20 - Oct 25 | Oct 20 - Oct 25 | Oct 20 - Oct 25 | 
		
			| Midnight | Oct 20 - Oct 25 | Oct 20 - Oct 25 | Oct 20 - Oct 25 | 
		
			| Starlight | Oct 20 - Oct 25 | Oct 20 - Oct 25 | Oct 20 - Oct 25 | 
		
			| PRODUCT(RED) | Oct 20 - Oct 25 | Oct 20 - Oct 25 | Oct 20 - Oct 25 | 
	
iPhone 13 Pro
	
		
			| Sim-Free | 128GB | 256GB | 512GB | 1TB | 
	
	
		
			| Sierra Blue | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | 
		
			| Silver | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | 
		
			| Gold | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | 
		
			| Graphite | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | 
	
iPhone 13 Pro Max
	
		
			| Sim-Free | 128GB | 256GB | 512GB | 1TB | 
	
	
		
			| Sierra Blue | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | 
		
			| Silver | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | 
		
			| Gold | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | 
		
			| Graphite | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | Nov 1 - Nov 8 | 
	
iPhone 13 mini - Carriers
	
		
			| T-Mobile | 128GB | 256GB | 512GB | 
	
	
		
			| Pink | Sep 29 - Oct 04 | Sep 29 - Oct 04 | Nov 03 - Nov 24 | 
		
			| Blue | Sep 29 - Oct 04 | Sep 29 - Oct 04 | Nov 03 - Nov 24 | 
		
			| Midnight | Sep 29 - Oct 04 | Sep 29 - Oct 04 | Nov 03 - Nov 24 | 
		
			| Starlight | Sep 29 - Oct 04 | Sep 29 - Oct 04 | Nov 03 - Nov 24 | 
		
			| PRODUCT(RED) | Sep 29 - Oct 04 | Sep 29 - Oct 04 | Nov 03 - Nov 24 | 
	
	
		
			| Verizon | 128GB | 256GB | 512GB | 
	
	
		
			| Pink | Oct 22 | Oct 22 | Oct 22 | 
		
			| Blue | Oct 22 | Oct 22 | Oct 22 | 
		
			| Midnight | Oct 22 | Oct 22 | Oct 22 | 
		
			| Starlight | Oct 22 | Oct 22 | Oct 22 | 
		
			| PRODUCT(RED) | Oct 22 | Oct 22 | Oct 22 | 
	
	
		
			| ATT | 128GB | 256GB | 512GB | 
	
	
		
			| Pink | Oct 04 - Oct 06 | Dec 31 | Oct 11 - Oct 18 | 
		
			| Blue | Oct 14 - Oct 21 | Oct 14 - Oct 21 | Oct 11 - Oct 18 | 
		
			| Midnight | Dec 31 | Oct 14 - Oct 21 | Oct 06 - Oct 08 | 
		
			| Starlight | Oct 06 - Oct 08 | Oct 11 - Oct 18 | Oct 04 - Oct 06 | 
		
			| PRODUCT(RED) | Oct 04 - Oct 06 | Oct 04 - Oct 06 | Oct 06 - Oct 08 | 
	
iPhone 13 - Carriers
	
		
			| T-Mobile | 128GB | 256GB | 512GB | 
	
	
		
			| Pink | Oct 14 - Oct 28 | Sep 29 - Oct 04 | Oct 28 - Nov 18 | 
		
			| Blue | Oct 14 - Oct 28 | Sep 29 - Oct 04 | Oct 28 - Nov 18 | 
		
			| Midnight | Oct 14 - Oct 28 | Sep 29 - Oct 04 | Oct 14 - Oct 28 | 
		
			| Starlight | Oct 14 - Oct 28 | Sep 29 - Oct 04 | Oct 28 - Nov 18 | 
		
			| PRODUCT(RED) | Oct 14 - Oct 28 | Sep 29 - Oct 04 | Oct 28 - Nov 18 | 
	
	
		
			| Verizon | 128GB | 256GB | 512GB | 
	
	
		
			| Pink | Oct 22 | Oct 22 | Oct 22 | 
		
			| Blue | Oct 22 | Oct 22 | Oct 22 | 
		
			| Midnight | Oct 22 | Oct 22 | Oct 22 | 
		
			| Starlight | Oct 22 | Oct 22 | Oct 22 | 
		
			| PRODUCT(RED) | Oct 22 | Oct 22 | Oct 22 | 
	
	
		
			| ATT | 128GB | 256GB | 512GB | 
	
	
		
			| Pink | Oct 04 - Oct 06 | Oct 04 - Oct 06 | Oct 04 - Oct 06 | 
		
			| Blue | Oct 11 - Oct 18 | Oct 08 - Oct 15 | Dec 31 | 
		
			| Midnight | Oct 11 - Oct 18 | Oct 04 - Oct 06 | Oct 14 - Oct 21 | 
		
			| Starlight | Oct 04 - Oct 06 | Oct 04 - Oct 06 | Oct 04 - Oct 06 | 
		
			| PRODUCT(RED) | Oct 04 - Oct 06 | Oct 04 - Oct 06 | Oct 04 - Oct 06 | 
	
iPhone 13 Pro - Carriers
	
		
			| T-Mobile | 128GB | 256GB | 512GB | 1TB | 
	
	
		
			| Sierra Blue | Sep 29 - Oct 04 | Sep 29 - Oct 04 | Sep 29 - Oct 04 | Nov 03 - Nov 24 | 
		
			| Silver | Oct 28 - Nov 18 | Oct 14 - Oct 28 | Oct 28 - Nov 18 | Nov 03 - Nov 24 | 
		
			| Gold | Oct 14 - Oct 28 | Oct 14 - Oct 28 | Oct 14 - Oct 28 | Nov 03 - Nov 24 | 
		
			| Graphite | Oct 14 - Oct 28 | Sep 29 - Oct 04 | Sep 29 - Oct 04 | Nov 03 - Nov 24 | 
	
	
		
			| Verizon | 128GB | 256GB | 512GB | 1TB | 
	
	
		
			| Sierra Blue | Oct 22 | Oct 22 | Oct 22 | Oct 22 | 
		
			| Silver | Oct 22 | Oct 22 | Oct 22 | Oct 22 | 
		
			| Gold | Oct 22 | Oct 22 | Oct 22 | Oct 22 | 
		
			| Graphite | Oct 22 | Oct 22 | Oct 22 | Oct 22 | 
	
	
		
			| ATT | 128GB | 256GB | 512GB | 1TB | 
	
	
		
			| Sierra Blue | Oct 06 - Oct 08 | Oct 04 - Oct 06 | Oct 04 - Oct 06 | Oct 28 - Nov 04 | 
		
			| Silver | Oct 14 - Oct 21 | Oct 06 - Oct 08 | Oct 06 - Oct 08 | Oct 28 - Nov 04 | 
		
			| Gold | Oct 28 - Nov 04 | Oct 06 - Oct 08 | Oct 06 - Oct 08 | Oct 14 - Oct 21 | 
		
			| Graphite | Oct 14 - Oct 21 | Oct 04 - Oct 06 | Oct 07 - Oct 14 | Oct 28 - Nov 04 | 
	
iPhone 13 Pro Max - Carriers
	
		
			| T-Mobile | 128GB | 256GB | 512GB | 1TB | 
	
	
		
			| Sierra Blue | Oct 21 - Nov 04 | Nov 03 - Nov 24 | Nov 03 - Nov 24 | Nov 03 - Nov 24 | 
		
			| Silver | Nov 03 - Nov 24 | Nov 03 - Nov 24 | Nov 03 - Nov 24 | Nov 03 - Nov 24 | 
		
			| Gold | Oct 21 - Nov 04 | Oct 28 - Nov 18 | Nov 03 - Nov 24 | Nov 03 - Nov 24 | 
		
			| Graphite | Oct 21 - Nov 04 | Oct 28 - Nov 18 | Nov 03 - Nov 24 | Nov 03 - Nov 24 | 
	
	
		
			| Verizon | 128GB | 256GB | 512GB | 1TB | 
	
	
		
			| Sierra Blue | Oct 22 | Oct 22 | Oct 22 | Oct 22 | 
		
			| Silver | Oct 22 | Oct 22 | Oct 22 | Oct 22 | 
		
			| Gold | Oct 22 | Oct 22 | Oct 22 | Oct 22 | 
		
			| Graphite | Oct 22 | Oct 22 | Oct 22 | Oct 22 | 
	
	
		
			| ATT | 128GB | 256GB | 512GB | 1TB | 
	
	
		
			| Sierra Blue | Oct 14 - Oct 21 | Oct 12 - Oct 19 | Oct 14 - Oct 21 | Oct 14 - Oct 21 | 
		
			| Silver | Oct 21 - Oct 28 | Oct 07 - Oct 14 | Oct 14 - Oct 21 | Oct 14 - Oct 21 | 
		
			| Gold | Oct 14 - Oct 21 | Oct 04 - Oct 06 | Oct 14 - Oct 21 | Oct 14 - Oct 21 | 
		
			| Graphite | Oct 14 - Oct 21 | Oct 07 - Oct 14 | Oct 14 - Oct 21 | Oct 14 - Oct 21 |