Purine signaling pathway dysfunction in autism spectrum disorders: Evidence from multiple omics data https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9935591/

and

https://www.mdpi.com/2218-1989/10/5/184

I do not think the spectrum of autism are caused by a single gene or environmental factor. I was diagnosed with Asperger's as well, much too late in life.