I have a Fairphone and i really wanna try out ubuntu touch on there some time. The functionality support with that is pretty amazing now, basically all relevant features are supported. The only issues are VoLTE not working and GPS being slow, but thats because of missing google services so cant be helped.

This also comes with waydroid btw, an android emulator thats pretty fast for all normal applications.

Fairphone 4 feature support: https://devices.ubuntu-touch.io/device/fp4/

Device list for ubuntu touch: https://devices.ubuntu-touch.io/promoted/