my world is missing or corrupted and I checked there are 83 worlds but 17 shows up and that's when I updated from 1.17.11 to 1.17.40

my world is corrupted or lost. i updated my minecraft from 1.17.11 to 1.17.40 and i see 17 worlds appear and 66 worlds disappear

The Problem Is
1. db File Or Region is missing

2. Level.dat And Level.dat_old And Png is missing

3. I give up. My Extreme Progress from Years Ago And My Project Are Gone

I hope You Read It. Thank You