The generic ARM desktop image for Oracular now supports the X13s. Status of Ubuntu support for Lenovo ThinkPad X13s
The 6.11 rc kernel in oracular-proposed seems to also now support the x13s based on this recent commit: Bug #2078929 “Pull in latest X13s commits” : Bugs : linux package : Ubuntu
When I upgraded to the 6.11 kernel using ‘sudo apt install linux-image-generic/oracular-proposed’ Ubuntu wouldn’t boot.
I tried going that route because the new 6.11 kernel doesn’t show up when I run ‘sudo do-release-upgrade -p’. Instead it says, "no new release found’.