How is it possible TMO still has most of the Xs Max models still available for 9/21? I remember from the 6Plus and 7Plus pre orders it was like this also but near release date customers were getting their dates changed. TMO did take care of us with credits and provided great customer service.
For the 6Plus it took so long and I had my date changed multiple times that I got multiple credits. 2 months I still didn't get my 6 Plus 128GB that I found an Apple store that had the Verizon one in stock and purchased it. The 7 Plus wasn't as bad but still took a month longer than I had liked.
I hope their system is actually correct this time, I do remember last year with the X that the date jumped to later date then reverted, then jumped back a couple of times.