Just as an example; There can be a lot of sensory issues for children with asd as well as a love of sensory stimulating things.
So 'girls' clothes, hair, toys ready often soft, shiny, glittery, ribboned, flowy etc. Young boys with asd can be drawn to them (I've had direct experiences of several young boys with asd who loved these things.)
'Boys' clothes can be more practical and comfortable and easy to put on; girls with asd can prefer them - as Temple Grandin describes. This marks both groups of children out as different to the norm early on and favouring or disinterested in stereotypically gendered items and clothes.
All children are individuals though and all children with asd, but obviously a girl who loves the swishy glittery stuff 'fits in more.' A boy doesn't.
One extra thing though is that often pressured clothing can bring comfort and relief to people with autism; you can get pressured under garments and also a "bear hug" which is a tight Velcro chest band with shoulder straps.
These are usually OT directed / prescribed and part of a sensory diet. Temple Grandin invented a squeeze box to relieve tension that she'd get inside daily.
A friend noticed her son was very happy when wearing a wet suit not long before his diagnosis.
I can't help wondering if binders off the same relief for some girls.