I like putting pressure on the arch of my feet. (Or where my arch would be as I have extremely flat feet.)
I actually bought a small wooden foot massager for this. As I’m working, I can just put my feet on this and roll them back and forth. I get the sensory input that I’m craving without needing to stop working to find something to press my feet against.
It definitely has shades of the anti-vax idiots that said they’d rather have their child dead of a preventable disease than to have autism. As a parent of a child who has autism, the parent of a neurotypical child, and a person who is autistic, I’m happy that all three of us are alive and well and disease free thanks to vaccines. Even if vaccines caused autism (which they absolutely don’t), I’d rather my child be autistic and alive than not autistic and dead.