My wife generally says that she's bi, but if she were coming out today she's said that she'd probably call herself pan, that just wasn't really a common term when back when she did come out so she's spent most of her life calling herself bi, and she just kind of identifies with that label more at this point.

To her, the term bi does kind of imply that someone is attracted only to males or females and would tend to exclude non-binary gender identities (though not necessarily trans people, being MtF or FtM does still kind of line up with a traditional gender binary, a trans man is a man and a trans woman is a woman)

Which doesn't really describe her, she'd be cool with any identity, which to her is more pan, but again she's just been calling herself bi for so long it just feels weird to change that, and since she's off the market at this point it's a little bit of a moot point anyway since she's not trying to get in anyone's pants but mine.