I have learned to tolerate hugs but I don’t like strangers hugging me still, and even with friends, I privately wish handshakes were still fine. (At least we’re not expected to kiss people in greeting anymore!!!)
I dislike being around many people, but this is FAR more true off medication. I can concentrate soooo much better on drugs that I’m not losing my mind anymore with too much people exposure.
It could be ASD. It could also just be the manifestations of ADHD in you and your child. Maybe he can’t understand others. Maybe he is so distracted by Russian spy satellites or his shirt or the air or nothing at all that these things don’t penetrate far enough to make an impression.
Getting the ADHD under control will help you see what’s left, basically.
To be honest, my unscientific approach is generally listening to speech patterns. There are distinctly ASD methods of delivery and conversational flow that are so tightly bound up in most ASD cases.