You know what, OP? I am an autism professional, quite eminent in my field. Spoken at national and international conferences, shaped local practice, innovated around our understanding of autism etc
So I don't like to boast, but my credentials as an autism parent are Highly informed.
I have an autistic adult child who despite no learning difficulties spent 4 years in a dark room barely getting dressed. Now age 25 they occasionally pet sit for neighbours but are otherwise unable to work, have dreadful social anxiety and don't shower unless forced. They finally started cleaning their teeth regularly this year having gone about 10 years refusing to do so.
I also have another young adult who we think could have received an autism diagnosis; we never pursued it because they never struggled in their environment and as pp have identified this is meant to be part of diagnostic criteria. This DC is "smashing it" - excellent grades at school, at a top uni, treasurer of a club, volunteers for charity in their spare time, on target for a high 1st and likely to get a high paying job. They do identify as autistic and have mostly autistic friends - but don't claim DLA or other benefits, as they don't need them.
The difference is not my parenting, pal. It's the way the autism has affected each. One has severe social anxiety, severe executive functioning needs, and significant sensory and flexible thinking issues, and no motor coordination issues.
The other has significant social awkwardness but not anxiety, excellent executive functioning, mild sensory and flexible thinking issues, and a bunch of motor coordination issues.
So how about you get off your high horse? Celebrate your youngster without deriding others.
Also - my kids grew up pre-screens, just.