I would imagine most societies would look sort of like Germany or Japan, but the real question is which widespread social norms are directly or indirectly caused by endemic and widespread Neurotypical Disorder, as well as what those social norms would be replaced by
For example, I would expect the attached poster to not exist for various obvious reasons. But how do you think an autistic society would handle the indication of listening/attentiveness?
Autistic people have it really hard in Japan, because there are so many hidden social rules and adults who don’t know or can’t follow them are seen as antisocial. Germany is not so bad. Here in northern Germany at least, people (NTs too) mostly accept direct communication and tend to be rather direct themselves. And I rarely had bad experiences when I needed to ask for clarification.