I am probably quite agender, as I have no intrinsic sense of my gender. I simply accepted my AGAB (assigned gender at birth) without questioning it. At some point, I realized that I don’t feel any connection to this gender, no feeling like other people have. I also don’t see it as something that influences my personality and I don’t apply to gender norms. I just don’t care about gender. (This btw. also makes it harder for me to understand people whose sense of gender is so strong that they even reject their AGAB, although I accept their feeling, of course.) So how do you “feel” gender?
Well gender is just a performance
So either you feel like you are performing it well or feel like you aren’t. You can feel like you are choosing the “correct” gender to perform or feel like that label for yourself is uncomfortable.
Those evaluations are made by you or other people, and how you feel about that is feeling your gender.