I use FLauncher, and the jellyfin for android TV app works great. You can cast with or without having the app installed but the remote is nice so I rarely use the casting feature for watching my locally hosted stuff. It’s just convenient for content on twitch or youtube.
The equivalents for Android, precompiled ReVanced APKs, are commonly used to spread malware. Following the instructions to patch the app yourself isn’t hard. Google taking down precompiled modded versions of YouTube but leaving patches and the the tools anybody can use to apply them is a neutral thing at worst.
Also I don’t see anyone in this thread glad that Google did this, aside from the first half of the joke / fakeout / pun post about IPA beer.