The thing to do is participate in the beta programs and report any bugs you find, as you're having so much instability you would be an ideal participant whereas me with my smooth running wouldn't.
EndeavourOS (Arch based) adds a repository which appears to be for their utilities, otherwise they use the Arch repositories. You could probably continue using it with minimal disruption although the utilities would be unmaintained.
Manjaro (also Arch based) uses its own mirrors of the Arch repositories and adds some of its own. If it vanished, it would quickly become out of date and full of security holes. A new install would be necessary.
In either case, I'd do a clean install of Arch because why give yourself the headache.
It may just be a pre-configured Debian in which case there will be nothing to convert or it may have several additional repositories in which case it will be easier to install the new one.
I'm considering making my next BBEG three kobolds in a trench coat and have this playing in the bar at the beginning of the campaign. They can't say I didn't tell them 😅
https://gitlab.gnome.org/groups/GNOME/-/issues
KDE doesn't seem to give you an overall view