Book recs where the fmc doesn’t know she has powers and/or how powerful she actually is

I’m looking for a book where the fmc lives a normal peasant type life, and slowly finds out she has powers. Or that she has weak powers to begin with and becomes insanely powerful.

Sort of want one set in a castle, but she isn’t from there to begin with. And I don’t really care what the mmc is like tbh.

Maybe a little spice ;)

Update: Thank you everyone for sending in your recs!! I wasn’t expecting such an amazing amount of comments on this!! My tbr is now full thank y’all sooooo much xoxoxoxo But keep commenting also hehe