It's been suggested in research in autism that there's a higher rate of dysmorphia in the heads of those with autism. Dysmorphia is the scientific name for abnormal facial features - such a broad forehead or wide eyes.
I personally personally have two crowns - or whorls - in my hair growth, an expressionless face a lot of the time, and my psychiatrist said that I had asymmetrical facial movements although I'm not sure if that was indicative of autism for him at the time.
Here's an article talking about it: https://spectrumnews.org/news/clinical-research-facial-features-can-help-diagnose-autism/
I personally personally have two crowns - or whorls - in my hair growth, an expressionless face a lot of the time, and my psychiatrist said that I had asymmetrical facial movements although I'm not sure if that was indicative of autism for him at the time.
Here's an article talking about it: https://spectrumnews.org/news/clinical-research-facial-features-can-help-diagnose-autism/