There are cases where drugs might be used, for teens with severe emotional problems or kids with seizures (which are common in people with autism). However, that's not what treatment looks like for everyone (or I dare say most people diagnosed with autism).
By and large, treatment for autism is centered around therapy. Occupational, food, physical, and behavioral are all common treatment routes for someone with autism.
There's no prescription drug regimen for autism.
There is nothing that treats ASD directly. But there sure are a whole host of charlatans that will try to convince desperate parents otherwise. As with pretty much every psychological problem the best we have is treatments to make the symptoms livable. Even what you mentioned earlier could be considered a treatment that addresses the symptoms not the underlying issue.
For some people, meditation and exercise only go so far. Shaming people/parents for needing medication and going with the "You just need to try harder" is what gets people killed. Medication isn't a personal failing.