It's weird, cuz like from what I've noticed, for me, my sexuality never changed on or off HRT or when I appear female vs when I appear male; I am 100% into guys, either way. BUT, the dynamics are different as a boy vs girl, I noticed.
As a boy there's a lot of...I guess you could say roles are important, and I prefer to be very submissive and like the guy to control me and all that, and there's just a lot of complex dynamics as a boy that extendc beyond just my attraction to a guy. My role in sex and such as a boy is pretty much as important as my attraction to my partner.
Then as a girl, it's like more focused on just my attraction to him, and like my role in it is totally irrelevant. I'm not thinking about me or what I want him to do to me, I'm thinking about him and being with him for him, not any kind of role or anything, although this is a little less intense and exciting than my sexuality as a boy, because I can admit that as male - and as a person that is attracted to males - im sexually attached to my own body, which I'm not as female taking away some of the intensity.
Soo, I think sexuality is complicated, but I dunno if orientation changes so much as dynamics change.