An actual good rec, to balance things out: Check out No Man of Woman Born by Ana Mardoll. It's a collection of short stories that focus on prophecy affirming various characters' genders. I think two are binary trans, but three are nonbinary, and one is questioning. (Plus a bonus binary trans one that doesn't have any prophecy in it.) Ana Mardoll is nonbinary/genderqueer xerself and has written a lot about writing trans characters. The whole collection is just so, so good and affirming, but it's not terribly well known yet, so I don't think it qualifies as "popular".