So this runs debian on a phone? Amazing.
Say hello to GNOME on #GrapheneOS (credit tuxpizza)

KDE Plasma reported not to work in certain situations but ways to overcome being looked at. Here is footage of KDE (credit Bench)
https://video.nostr.build/fd24bcf221c80de0fd22733d5081dc5ced26c591fa61bcb023362ed3320ae59a.mp4
https://video.nostr.build/e60008124a521eadc90e04610b740605865f064df49b384937cc3e6218a9979f.mp4
Discussion
Currently it is Debian as that is what the upstream feature uses and downloads. Usage of other, better suited distros would be looked at in the future. It has to be a distribution with ARM support. Potentially Fedora.