I think a major factor in Autism is the foods we now consume, along with all the extra “waves” we have flying around the place around us.
If you’re at home with the missus, that’s 2 phones connected to the WiFi, laptops, heating controls, Bluetooth headsets, Bluetooth in cars, multiply that by 3 as there is most likely a house either side you with the same.
Going back 30, 40, 50 years an autistic child was probably put in a home, to silently rock back and forward in a chair in the corner all day.