This is a tough question to answer but Disney does pride themselves on assisting guests with Disabilities, here’s how they describe eligibility:

Disney Parks’ goal is to accommodate guests who aren’t able to wait in a conventional queue environment due to a disability (including non-apparent disabilities). Guests should visit Guest Relations to discuss their assistance needs.

More info on the program can be found here: https://disneyparks.disney.go.com/blog/disney-parks-disability-access-service-card-fact-sheet/