Just because Meta does it doesn't mean you should. The arms are horribly disturbing and creepy. Please make seeing your own avatar optional. I'll probably have to give up on bigscreen otherwise, I can't stand to look at them.
I can't sit comfortably and use the web browser or anything else in the Oculus home environment anymore either.
There was a good reason nobody implemented arms before. They don't work. Unless you can 100% guarantee that the wrists and elbows are doing what the user is doing, then don't show them.
Another good reason to hide the arms? They get in the way. If you could see right through your own body while trying to watch tv, wouldn't that be convenient?
Maybe somebody somewhere likes arms, but I know a great many who also want them hidden.