the easy answer is that trans people get roped into the queer community so more of them come out as gay & bisexual like their cis peers. there may be a larger discussion about the overrepresentation of gynephiles among trans women but agp is a very reductive answer, especially since a lot of people, cis & trans, male & female, gay & straight are autogynephilic in the literal sense of the word. also the fact that this overrepresentation of homo- & bisexuality is mirrored for FtMs doesn’t jive with agp theory I wouldn’t think.