A private school that does not have government funding IS still covered by the ADA and OCR, but not under Section 504. I posted the language in my first post on this thread. Generally it seems that issues of access predominate.
If a student takes a medical leave (including in the middle of a semester), or a student has a reduced course load as an accommodation, then a college cannot legally enforce a graduation time limit that is meant for students who do not have leaves or reduced course load. And financial aid should cover the extra semesters that a reduced course load requires.
Peers in high school do not understand health issues. Adults don’t either. It is easier having a concrete health event like surgery than a chronic condition, especially if it is invisible to others.
We did not choose schools based on their accommodation policies, frankly. We felt our kids deserved access to any school and if we ended up trailblazing a bit, so be it. We did find much more understanding at the college level, among administrators anyway, so hope that helps/