I know some autistic people are definitely not gender nonconforming, but my guess is that of the ones that are, they might be more inclined to embrace their nonconformity and not try to make themselves fit gender conformity standards.
For me, I was/am not motivated/inclined to conform for several reasons...
I am naturally a nerdy tomboy and my areas of interests and aptitudes are under what most societies call a masculine realm.
Feminine stereotypes and gender roles are unnatural to me, and I feel very strange when trying to act or emulate them, and some of them I find degrading.
I am also very bad at acting 'my assigned gender role' and I get ostracized and hated on when I try to do them, which is very discouraging.
And since people hate and outcast me whenever I try to conform to their gender roles, I typically decide to abandon all attempts at it because it is agonizing trying to play the part, as I never thought the whole gender role thing is all that ideal or realistic, and I personally don't want to have to participate in it. And their rejecting me when when I try just defeats the point of even bothering to try.
Normally I just do my own thing and try to keep controlling people out of my business as much as possible.