>..i even added an extra role called tempAdmin and assigned all rights – didnt work either…
WP doesnt work that way.
see https://plugintests.com/plugins/wppizza/latest
at the bottom of that page are all the capabilities the admin should have.
once you(the admin) have restored access to the “access rights” link you probably want to go to that page , check the settings for each role and save it (in fact, save it 2x , just in case , as you are setting things that probably not yet exist. Not sure this is strictly necessary, but wont hurt)
seems like something destroyed some of them assigned to your user(s) if you are saying you used to see all tabs, but some went missing