I'm AMAB cishet, but I've been struggling with understanding my gender vs my sex. I'm very comfortable with my body, including by sexual characteristics, but have never felt a strong affinity to the male gender. Is there a term for this? Everything I look up includes some kind of body dysphoria, which is not something I relate to.
Adding a different angle to the other answers: it would probably be interesting to you to also try and understand what masculinity even is in our society. For most men, traditional masculinity is toxic and hollowing of the self, so it's no wonder more and more men don't identify with it.
I really liked this video about this topic, if you have the time.