Stuff I used before the last couple of updates no longer work.
Cinnamon - missing libgoa-backend
Linphone - missing libQt5Quick
Gnome - Extensions not working
As the above items are in the normal repositories I’m confused why they wont install properly.
“The last couple of updates” included Plasma6 and Gnome46, so my guess is that:
libgoa-backend is now at libgoa-backend-1_0-2 and that might not be compatible with Cinnamon;
missing libQt5Quick is not currently in the standard repo, but there are somewhat similar packages you may check;
some extensions are still not upgraded to Gnome46 and don’t work; if you give more specific info somebody might be able to help you.