SP, what supports would you like the university to provide? I have ADHD too and would love to have some supports but can't think of much of anything I could ask for that would be something the university could provide. (I have not requested accommodation at my school.) If you have ideas, I would love to hear them. At my university, you can get extra time for a test or an isolated and quiet spot to take the test. I really appreciate the latter option, as all of the people clacking noisily on their laptops in the class can be very distracting to me. I asked my professor informally if she could ask that those with laptops sit on one side of the room so there can be a laptop free zone on the other side, but she wouldn't do it. I have had some professors do that and have found it really helpful so I didn't think I was asking for anything outrageous. I didn't want to tell her I would like this because of ADHD. I don't like to share my health information with professors.
I don't like it either, so I try to limit the spread whenever I can. I don't readily give release for my health care providers to discuss me with anyone else unless there is clear benefit, and I don't use insurance for mental health. As far as my insurance is concerned, I have never sought services for mental health. I guess we do the best we can and then just try not to worry ourselves too much.