Just got the update on my S21 Ultra. It didn't have beta software and was on regular Android 11.
On my S21 on Beta 4 (also TMobile), no update yet.
On my other S21 (TMobile) on regular Android 11, no update yet.
EDIT: An hour after S21U, S21 regular (NON-beta) got the update.
This is concerning. It seems to be following the same pattern as the Android 11 beta on my Note 10+ last year. Non beta users got the stable release a month or more before those of us in the beta. If that happens again on my S21 Ultra then this will be my last time doing a Samsung beta.