yeah it's pretty messy
there was an original condition called "autism" which referred to the stereotypical, ""low functioning"" case where someone has intellectual disabilities and the rest
then a ""high functioning"" variant was labelled, where the intellectual disability was missing, called "asperger's syndrome"
then more and more inbetween cases started being labelled like rett syndrome, CDD, PDD-NOS, and so they had to say "fuck it, it's all "autism spectrum disorder" now"
over time, "autism" has become shorthand for ASD. to avoid confusion, the OG autism sometimes gets described as "classic autism"
honestly it's all a big mess
it's the same type of non-performative speech you see when any company says "we value our customer's complaints", or "we work hard to have a diverse and inclusive team", as if by merely saying these things that it magically becomes true
ah but meta has cracked it this time; if they just say "we never sell your info" that means they don't, right?