Variables to consider:
1. Your genetics. There are cannabinoid receptors in our brains and throughout our bodies, suggesting that humans have used these plants, in some way, since we were "3 hairs from being baboons". However, autistic brain chemistries can be a bit different due to genetic variations in neurotransmitter release and uptake. Not everyone is the same.
2. The product you are using. Different concentrations. Different types of CBD and THC and whether or not the product contains the associated polyphenols. There's been quite a bit of hybridization with plants accounting for different products and use cases. I'm certainly no expert, but do know a little bit because my wife takes specific types of THC/CBD mix for her migraines. Do your research on this, as it isn't quite as "straight forward" as one may think these days.
3. Although in some areas of the world, psilocybin is illegal, but if you are able to use it medically in your area, or "micro-dose" if it is legal, this may also be of benefit. Most of the study has been at specific research centers, like John's Hopkins University Medical Center. A therapeutic response will improve social functioning and communication, at least within the context of the limited studies that have been done.