Baŝto

At least on FireTV most apps work. (Not played around with AndroidTV yet)

Often they just don’t work with a remote, but you are always free to connect bluetooth/USB keyboards, mouse etc.

The official/standard app doesn’t work (well) with remotes, but F-Droid Classic works fine, though not 100% either (when an app is selected focus is not on anything visible, reading description and antifeatures doesn’t work), but installing, uninstalling, updating, filter and search work just fine.

There is also at least one list with apps that (kinda) work on AndroidTV

Though the only app I really use is Xtra, which doesn’t work with remotes. I also use KDE Connect, but I don’t remember how well it worked remotes, but once it’s running it doesn’t need any further interaction and you can send files and paste from a PC/laptop etc.

Some apps explicitly support TVs, like: Kodi, NOVA , Moonlight, BiglyBT, Shadowsocks for Android TV, Jellyfin for Android TV …

I was wrong. It works now, there is a button to get to appstore, and it’s always possible to get to apps by long pressing the home button.

I can’t recommend it for such a use case. There is no way to automatically start it unless somebody found a new workaround since the last time I tried it. (I hijacked the home button via a accessibility until they removed that possibility) Though it depends on your use case. It’s probably okay if you always have internet and never have the situation where you are offline and want to watch material from a USB stick or something like that or stream it from another home server. In that case fire TV would lock you out and tell you to fix your internet, but only settings are available and all apps are hidden.