The Return of the Mandalorians. Any time soon?

That's because he isn't. He's in fact a human from Concord Dawn. When his parents were killed, a Mandalorian faction found him, took him in, and trained him (yes, this is canon).

So technically Boba isn't Mandalorian either. In which case it made sense for the devs to remove the tag, not only because he was the only one currently in the game at the time, but because he isn't one in the first place.