> they do, but it's on fdroid too
It's notoriously not on f-droid. The way FUTO licenses and/or builds its thing is made deliberately incompatible with f-droid's main repository.
You can add the futo repository to the f-droid client, but when people talk about f-droid they really mean the main repository, not the extra hoops to add less trusted third parties.
Also the way they publish it it doesn't have the reproducible build features of F-Droid
sad, I didn't realise that because their website has an "install from f-droid" link. it does reinforce my point that android is a proper platform with a viable distribution mechanism though, if they can self host a third party repository.