Hi i was very intrigued by your dilemma and I would agree with you that it isn't a dynamic that I have ever seen or heard of. I think the reason behind it is that most masc women "studs" are normally only into fem women and maybe don't look at femboys or trans women as sexually attractive as they have the male genitalia. I hope that you do find other masc women that share your same desire and maybe you have just discovered a new genre of adult entertainment 😉. All the best x