I too have read from multiple sources that when you compare proportions of people who do not identify as women or men, that those proportions are higher in autistic populations than non-autistic populations.
Personal experience with gender identity and dysphoria:
I identify as non-binary or genderqueer.
Since childhood, I never really felt like a girl. I mean, I was not totally uncomfortable with the label, but it didn't
feel totally right. I don't know how to describe that better.
People usually labeled me tomboy. I did "boy" stuff. I loved to climb stuff, be really acrobatic and daring, wrestle. I was aggressive. I picked fights with boys at school. People thought I did not "sound" like a girl lol I didn't really know what that meant, but I guess you could say my voice was a little deep for a typical girl's and quite raspy.
I remember being told often that some of the stuff I liked and the activities I enjoyed being involved in weren't "proper" for little girls like me and I was always just so confused. I actually used to think it was total nonsense. I thought, "I like this. I'm having fun. What could possibly be wrong?" I was always an extremely logical child
I never liked dresses very much. I wore them sometimes in the summer, because they're comfortable and keep me cool. But I was never one of those, "Oh my goodness that is so pretty I want to look pretty!" type of people. It was usually for comfort in hot weather.
I excelled in all subjects, but especially mathematics and science. People thought boys naturally did better in math and science. This of course we all know now is total bull. I am in fields that are notoriously unwelcome to non-men (physics, data science).
When boys started noticing me more when I was 12, 13, I thought, "Ew. Why??" Lol When I got to high school and boys there noticed me, again, I'd be like, "Why??"
I just thought that boys would be more interested in quite feminine girls, not this non-feminine person. But I was wrong I guess!
When people would refer to me as "woman" it didn't feel right. I didn't know why, so I did some research on it and learned about gender dysphoria. I mean, I certainly do not identify as man, but I appreciate my more masculine qualities. I do have feminine qualities too, and most who see me would automatically assume I am a woman. And I guess I am not too bothered by it, but that's not quite accurate.
So I decided the best fitting gender identity for myself was non-binary or genderqueer. I have no strong ties to any gender. I am "ok" with being called a woman, but I'm not totally comfortable with it either. My ties to that gender are rather loose. I don't mind she/her pronouns, but also like them/they.
I see myself as a person, and that's that. Gender is a social construct anyway. I always found it nonsensical that a lot of human attributes, and even non-human attributes for goodness sake, are assigned genders. It makes absolutely no sense.
While the concept of gender makes zero sense to me, I of course would not go around telling binary folks (those who adhere to a gender binary) that they're stupid and make no sense. I always believe that when it comes to stuff like gender, sexual orientation, etc., that anyone should be free to choose how they identify, and they should not be attacked for their identities.