I am non-binary, however I was quite envious of some of girl's activities, but not others.  I liked sewing and cooking, but I also liked working on the car with my dad.  I got teased and picked on for liking sewing and cooking, and playing with dolls (I had GI Joes and my sister had Barbies, and they reguarly had "get-togethers", lol).  Sadly, I let peer pressure get to me and I began pretending to dislike these things so I wouldn't get picked on so much.  I couldn't get out of cooking (my mother was insistant that I learn this skill) but I got out of learning more sewing, or continuing to play the flute (because, that was too girly and got me picked on too).  In retrospect I wish I'd have told everyone to go **** themselves and continued doing what I enjoyed.  It's taken me a lot of effort to go back and relearn some of these things, sewing in particular.  I now do garment work and quilting in both fabric and leather, and I'm very proud of this!  I also cook like no-one's business!
As I grew older and began puberty, and watched my afab peers changing as well, I grew rather envious of their developments.  I wished I looked more like them, and less like a boy.  I grew especially envious of my sister as she grew older because she was a tomboy and switched back and forth between "boy-mode" and "girl-mode" with seeming ease.  An ability I wished I had.