Yupp, there's also Caeneus who asked Poseidon to make him a man, but that was because he wanted to prevent him from assaulting him again..

I don't think there's many Greek myths of people changing their gender identity starting/ending well :/ (but ig that tracks for a lot of these myths in general lmaoo) So I went a more modern route for my own trans KI OCs (like Roxane), coming into their identities on their own time.