Posting in the even it helps someone else - sorry for the serial posts!!
My curiosity got the better of me this afternoon and I called 611 for T-Mo support.
Had a wonderful conversation with a T-Mo Rep and she checked my shipment. She saw that as of that point in time, my account said that the shipment was expected 3/21-4/4, we were a day beyond that, and she said that she wants to get the shipment out asap. She asked if it was ok to put me on hold, and that it might take 3-5 minutes to get back. When she got back, she said the label was just created and she's got a tracking number. Amazing.
Not sure how things work in their shipping process, but I was ready to hear a mid-May shipment date, and it seemed like there was some expediting going on.
Regardless, the tracking number is real

and my S22+ will be here in 2 days.
For anyone waiting, consider calling 611 and see if that helps!