My daughter also has commended and AP Scholar with distinction and she isn’t using them. I agree that AP scholar is the first to go because presumably you have the opportunity to self report those scores elsewhere so if a college cares about it they already have seen it. Commended I think is hated on a bit harshly- most kids not on CC would still love to have scores in that range. But again, if he has similar SAT or ACT scores it isn’t really signaling anything new (though I’d absolutely use it if there wasn’t anything else).
I think the Biliteracy Seal is interesting so I wouldn’t hesitate for him to use it if that is what he wants.