Can't update Xubuntu 20.04 Focal Fossa (LTS) to the next LTS release (22.04 Jammy) | pressku.com

The do-release-upgrade(8) programme says I request to instal each updates earlier it tin spell to work

I person done what I tin (all arsenic root):

apt-get --quiet --assume-yes update apt-get --quiet --assume-yes upgrade

At which constituent it says these packages person been kept back: fwupd-signed gnome-software gnome-software-common gnome-software-plugin-snap ubuntu-software

This strategy was Ubuntu erstwhile delivered (by System76), and I changed it to Xubuntu. Could these beryllium remnants of Ubuntu?

In immoderate case, what tin I do now?