Canonical hosts Ubuntu Base images for ARM and other architectures. These are minimal root file system images. After installing them, one can install desktop environments and use GUI with VNC on the same phone. It is possible to play sound too.
Do we support them on this site?
These images can be installed in almost any Android device (even on 5+ years old discarded Android phones), and have a lot of possibilities (which will only increase in near future) with the so many (recently released)
libhandy-based, touch-friendly applications.
These images really come handy
Foliate eBook reader running on my
armhf Android phone, with an Ubuntu 20.04 base image in Termux.
In case we don't support them currently, let's have a discussion if we can support them from now onwards. Since Ubuntu-on-Android was discontinued, and Canonical shifted its focus from Ubuntu Touch, this is the next best Ubuntu experience we can have on Android phones and tablets.