I have a Sony Bravia A80J with the built-in Google TV. It is running Android TV 10. I hate the Google TV homescreen with the huge ad banner, so I did the ADB trick to disable it and use FLauncher instead. Great.
One very small thing I've noticed that isn't a dealbreaker but would be nice to get fixed, is when I turn off/on the TV, it does not return back to FLauncher/homescreen. It just stays on the last app that was open. It does this even if I leave the TV off for hours before turning on. Is there a way to get it to go back to the FLauncher homescreen when waking / turning the TV on? I am not sure if this is specific for the Sony TV implementation or not. I did try sideloading "Launch on Boot" for the launch on wake option, but that did not work for me.
EDIT: I figured out a solution that will work most of the way for me. I ended up using Tasker (side loaded) to create a task to launch FLaucher when the display turns off. Pretty simple and it seems to work well. The only hitch is that it doesn't have the 30 second wait like the native Sony wakeup (if turned back on within 30 seconds, return to previous screen, if more than 30 seconds then go to home screen), it just always goes back to home screen even on a short off cycle. I'm sure there's a way to do this in Tasker with some type of custom variable that can track screen off time, but I'm too lazy now and I'm thinking I'll be 99% if not 100% happy with the simple task.
Crazy to think that I bought Tasker for my old Droid phone about 12 years ago when I was a poor college student and now I'm still using the same purchased app 12 years later on my TV's operating system.