I believe you need to install xfdesktop4 and then select that in your login manager. If that doesn't work go through other packages that would have been install

I believe you need to install xfdesktop4 and then select that in your login manager. If that doesn't work go through other packages that would have been installed: https://packages.ubuntu.com/jammy/xubuntu-desktop https://packages.ubuntu.com/jammy/xubuntu-desktop