I would've thought AC remotes would form part of the chattels/fixtures as they go with the AC which is generally a permanent fixture.
TV aerial etc I'm not so sure about. mailbox I would've thought would get included but maybe not?
so long as nothing is missing from when you did the pre-settlement inspection to when you settled/took possession then I doubt there's much you can do. if it wasn't there to begin with then they're unlikely to include it retrospectively. they're mom essentials anyway (well maybe bar the mail box)
I'd call the company up re the AC remotes though. you need those!