Admissions is separate and communication with the disabilities office is confidential. Admissions do not discriminate on this basis.
However, you can get a lot more information once accepted. We waited until acceptances and then talked with schools for that reason.
In theory, a person has a right to accommodations and support at every school, sufficient to enable them to do the work they are capable of. (Note that the standard for accommodations is lower than high school, though).
I would choose schools based on other factors- cost, academics, size, location, weather, “vibe” and then, once accepted, probe deeper about how ADHD is handled.
It helps to have a psychiatrist involved, obviously, and help with time management is invaluable. Accommodations like single room (if desired), extensions on assignments, notetakers (often not needed these days), testing in a separate room, extra advising and so on are available at most campuses.