A couple of the big bloggers have published posts on this recently- there is basically zero award availability, even in programs / carriers that were reliable in opening last minute seats. Flights are full, capacity is still limited on some routes and there are huge amounts of points in circulation with a lot of people chasing the same seats. BA grounded all their 747s and half (?) their A380s with only a few 787s added, that is a lot less CW/F seats in the air than pre pandemic

BA did recently add a bunch of F seats so perhaps things will loosen up. I also suspect some speculative trips will get cancelled as people realise the reality of hotel/car hire pricing in Europe/the US. No guarantee these seats will open back up as award seats

my advice is to save your points and book early for 2023 !