Beaverton GMC said they had to change the way they do business due to the current supply chain issues, and it sounds like if something is on constraint they don't even bother to submit the order. As
@StephenPT noted, they are owned by Lithia and move the most vehicles in the PacNW, so my guess is if an order is "good" (nothing on constraint) they submit the order and it gets accepted right away. Unfortunately, my vehicle wasn't aything special (or so I thought), but literally one thing after another was on constraint so I just canned the order and told them I'd wait for a '23.
Just a guess ... but given the Denali Ultimate is coming in the Fall, it sure would look bad if GM was like, "DENALI ULTIMATE! SUPER-CRUISE! MASSAGE CHAIRS! IT'S TOTALLY AWESOME!!! *small print* super-cruise, massage chairs, front/rear park assist, center console, 2nd row captain's chairs, heated steering wheel, 4-way lumbar, Bose speaker system, Tech Package, Max Tow, Adaptive Air Ride Suspension, and folding side mirrors all on constraint and will be $50 credits to be retrofitted later*
Just a slightly funny way of saying I'm guessing (and hoping!) that the initial batch of '23's will be fully-equipped with no retro-fits needed.