Just opened my liightroom after 2 weeks and almost all my collections and photos are gone, all my edits and such are gone.
only 80 photos exist for some reason....
I also noticed now that I have no catalog backups from the recent year (last one is from november 2020).
(I used Lightroom hundreds of times during 2021 and it worked perfectly).
You have most likely (accidentally) opened the wrong catalog file. Go to File->Open Recent and select each catalog shown there until you find the catalog you want.
Not the case unfortentely, I searched all folders and backups on my computer, and it seems there are'nt any catalog files (LRCAT) created or modified during 2021.
No searching was suggested (yet). Did you go to File->Open Recent in Lightroom Classic?
Yes, it only shows me the onr from 2020 and nothing else