Rebuild networkmaneger is up, the move to a meson build completely broke it, back to autotools for now.
EDIT:
To get the new version, you will need internet first 🙂
So sudo pacman -U /var/cache/pacman/pkg/networkmanager-1.46.0-1-x86_64.pkg.tar.zst
to get the working version, restart Networkmanager, then update.