Does anyone know if this is covered under the Apple Care plans? My 16" M1 MBP keyboard has been no problem, I'm just curious. Not saying that negates the issue.

Unfortunately, AFAICT, these repairability issues are largely due to the move to thinner and lighter laptops. Replacing my MILs Microsoft Surface tablet was a pain in the butt. Had to cut the case open and tape it back together. But that thing was insanely small and light. My MIL liked it because she has a lot of trouble carrying anything very heavy.