It’s almost all clichés and stereotypes. Autistic people are the model disabled person in media the same way Asian people are the model minority. Autistic characters are almost exclusively difficult for neurotypical characters to connect with, they have some sort of “super power” (Sheldon Cooper and Quantum Physics, Shaun Murphy and the human body, Raymond Babbitt and counting cards, Gary Bell and wavelengths…), often having difficulty with eye contact, and usually with physical, visual, or auditory sensitivities.