I don't think there's going to be any or more than a little josei or Shoujo, but there are some more Shou en ai I think if you don't mind that. Trying to remember a name cause there was a pretty good one
https://www.mangago.me/read-manga/yuzu_no_koto/
Not exactly romance, made by I believe a queer author, but keep in mind the translation team makes it seem as though MC's friends are misgendering him when that isn't the case at all.
https://www.mangago.me/read-manga/claudine/
Tragedy genre. Just make sure to ignore the goofy transphobes in the comments.
https://www.mangago.me/read-manga/boys_run_the_riot/
SUCH a good manga on transgenderism. If I remember correctly MC sorta started a romantic thing later on in the manga with his crush.
Unfortunately there really isn't a lot for this kind of category, since manga is made in such a conservative country, but I recommended what I know (⌒▽⌒)
any shoujo or josei love story where the ML is trans? tytyy