I've seen both versions used pretty much interchangeably, since the sort of person who ends up on this bingo will not distinguish between AFAB/AMAB and transmasc/transfem. But yeah, for us they're different and that makes more sense.

Is transmasculine related to presentation? I've been kind of defining it as "AFAB whose gender is vaguely masculine" in my head, but IDK if that's how they define it because I can't keep up with the terminology.