Seems to be fixed now. Just ran an update and working again.
There’s another thread about this. Today’s update was borked by a some missing updates for Qt6. You may have only gotten part of the required files, which caused the failure. https://discuss.cachyos.org/t/qt6-upgrade-to-6-10-1-breaks-sddm-plasma-delay-upgrading-until-plasma-workspace-6-5-3-2/19029/21