The 'high functioning as a misleading term' has been discussed in depth upthread, so there's no reason to start it up again.
To recap,
"HFA is not a recognised diagnosis by the American Psychological Association (DSM-5) or the World Health Organization (ICD-10). HFA is often, however, used in clinical settings to describe a set of symptoms related to an autism spectrum disorder whereby they exhibit standard autism indicators although have an intelligence quotient (IQ) of 70 or greater
Source de Giambattista, Concetta (2019). "Subtyping the Autism Spectrum Disorder: Comparison of Children with High Functioning Autism and Asperger Syndrome en.wikipedia.org/wiki/High-functioning_autism
This is a good explanation of why the term 'high functioning' is being phased out in the UK, because it's so unhelpful. Many people equate it with 'can pass for NT without any problems' or call it 'mild autism' but that's not representative of how someone's autism affects them.
The term High Functioning Autism denotes an IQ of over 70, nothing else.
HFA is not a recognised diagnosis by the American Psychological Association (DSM-5) or the World Health Organization (ICD-10). HFA is often, however, used in clinical settings to describe a set of symptoms related to an autism spectrum disorder whereby they exhibit standard autism indicators although have an intelligence quotient (IQ) of 70 or greater
This gives a further explanation.
"People who can speak aloud and have reasonable control over their motor processing are often called “high-functioning,” and yet these autistics often struggle with employment, relationships, and executive function.
My doctor recently referred to my autism is “mild.” I gently pointed to my psychologist’s report which stated that my executive dysfunction as being greater than 99th percentile.
“That means I am less functional than 99% of people. Does that seem mild to you?” I asked her.
But, you see, I can speak, and I can look people in the eyes, so they see my autism as “mild.” My autism affects those around me mildly but my autism does affect me severely"
above quote from neuroclastic.com/its-a-spectrum-doesnt-mean-what-you-think/
Getting back on topic, it does appear as though the OP is not returning. I hope she found a good solution to her problem and that other people who insist that consequences should be applied to a teen with ASD in a similar way to a teen who is NT have learned why in this situation, that's not a viable option.