This is the exact situation most of us are facing. Marriott should have just suspended its annual category change implemented back in March 2020. They suspended the change in APAC only. But travel is coming back much faster than in US and Europe.
The folks at BonvoyChampion email are not good. You'll have to call. But if the hotel tells you they can't change it, then Marriott can't change it either. The agent may be able to give you like 5,000 or 10,000 points. But the final answer is probably a firm NO.
It is a Marriott corporate decision.