To add onto this, if you care about supply chain attacks, bitwarden mobile supports Fdroid builds (albeit not part of the main repo because they rely on xamarin) so you can host your own fdroid repo and run your own builds if so desired.

If you are making your own build, is there a benefit to using f-droid? Why not just install the APK?

Update notifications?

You can just use local CI to build it and then when your F-droid checks for updates you get a push notification on your phone.

If you want to gate it, you can just periodically update the local git repo after you reviewed it (or just follow up to main minus a few days).

you don't need to fork it... just add an account at the main screen and set the backend url to whatever your server resolves to.

I think they meant if they don't like the direction that the Android client takes, i.e. they stop allowing you to change the backend url for example in which case, yes you would need to fork or rewrite it