Comment 6 for bug 1999649

Update: I installed a missing dependency

sudo apt install pipewire-alsa

then reinstalled ubuntu-mate-desktop as that was removed during the partial upgrade after installing the dependency.

I am no longer getting the partial upgrade warning. I am keeping this bug open as I don't think I should have had to find out why or what broke doing upgrades daily through apt. New users would never know what to do if this happened to them.