

They should be aware, it’s not a new or poorly explored correlation. It’s been pretty well substantiated. That said it would not be the first time a doctor was ignorant about issues for people with autism, of course
From a quick search:
https://journals.sagepub.com/doi/10.1177/27546330241238668 - 80% of adults and adolescents with asd experience sleep disruption
https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2020.00273/full - 50-80% of asd populations in western countries experience sleep disruption relative to 20-50% of neurotypical peers
https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2019.00366/full - rates reported higher, as high as 65-93%
Autoimmune disease throws everything off, generally
Advice with a big caveat: you can consider seeing a multisystem doctor. In some hospital systems this is a called care coordinator, multisystem doctor, etc. the big caveat is there is also what are called integrative or functional medicine doctors. These are not inherently bad but you have to do your homework as some will move into pseudoscience bullshit. But there are many that stay to evidence based practice.
The point of all these practitioners though is to counteract the issue you mentioned. They are supposed to have a holistic view and coordinate care for complex cases. You may want to ask for a referral at rheumatology, in my experience they tend to know these doctors the most (bc again autoimmune is the worst)