super specific request but…any historical fiction (medieval-ish) books about a girl who has to play espionage by disguising as a guy, or something similar?

something like Book 2 (the girl in the tower) in the Winternight Trilogy by Katherine Arden, or any of those cheesy YA historical fiction novels that were all the rage back in the mid 2010s haha. kudos for something more mature (as in, more aimed for adults. not specifically sexual) and outside of the YA genre, but I'll be fine with YA.

I'm okay with fantasy but i really prefer real world/realistic settings.