I looked into "What should I do besides Snap?" about 4 months ago; got quickly overwhelmed, because I don't have enough knowledge to understand what's fringe vs. common.

I'll definitely take a look at Flatpak again in the next month, 30 second Google says its possible (h/t /u/ damiano-ferrari at https://www.reddit.com/r/FlutterDev/comments/z35gdo/can_you_...)

(thanks for your interest btw, been working on this for ~year and this is my first outside feature request :) may there be many more)