thank you for understanding where i'm coming from! unfortunately the medical model of disability is often extraordinarily flawed (especially when it comes to autism, sadly) and so it's one of those things where the medical model is... not necessarily what any of us want to be referred to as or by, you know? functioning labels honestly don't give you a good idea of capability and they're often used to silence us - either by brushing off autistic adults' concerns as "well you're high functioning" and ignoring neurodiversity altogether or discounting them the other way by assuming and infantilizing folx who fall under the medical model's "low functioning" label.
some more reading: a bunch of links, but generally as a person with asd, most of us don't want those labels at all because they tell you nothing about our actual capability or ability and those boxes are... wide but shallow, in that they encompass a lot of information that isn't particularly helpful in describing the actual specifics of what's needed regarding accommodations or particular differences in functioning where... those gaps in ability vary so wildly from autist to autist. personally i just refer to myself as on the spectrum or an autistic adult, person with asd...