Hi!
Ace epic fantasy writer here.
I have a sex-repulsed ace secondary character named Fiona. She gets POV chapters and is a substantial driver of the series-wide plot. She also makes her identity as clear as it can be in a world that doesn't have the term "asexual". That said, the story is a massive epic that spends a lot more time in other characters' heads, all of whom are allo, many of whom are LGBT+. The protagonist is gay, and his romantic subplot takes up a lot of real estate in the series.
If you're looking for an ace MC or a story that deals heavily with aceness, this wouldn't be a good fit. Ditto if you aren't comfortable with on-page sex scenes (there aren't many, but they exist).
But if you're looking for a big ol' Fantasy story that happens to include explicit ace rep with a POV character, this might work for you.