Ubuntu Touch is now powered by Ubuntu 20.04 LTS, the current 3 year old Ubuntu !

mais avant c'était en 16.04 ...

in addition to re-basing to Ubuntu 20.04 LTS, the new Ubuntu Touch release is aiming for Android 9+-based device support, has forked Unity 8 as Lomiri, switched from Upstart to systemd for its init system, shifted development from GitHub to GitLab, moved from Anbox to Waydroid, and has adapted many of its components to be able to build properly under GCC 12 and Qt 5.15

puis le nombre de bugs ... :
https://ubports.com/fr/blog/ubports-blogs-et-nouvelles-1/post/ubuntu-touch-ota-1-focal-release-3888