As a part time wheelchair user (inside) and crutches (outside) I am a bit more sensitive to the variations in what “accessibility” can mean. Air lets you state that your place has:
Wide hallways
No stairs or steps to enter
Extra space around bed
Accessible-height bed
No stairs or steps to enter
Wide entryway
Fixed Grab Rails for toilet
Accessible height toilet
Roll-in shower
Shower chair
Hand held shower head
Wide doorway to guest bathroom
Instead of the old “Wheelchair friendly” or “Accessible”.
So while there are no doubt ADA compliance standards, which ideally everyone will follow, not all will be suitable for hosts without renovating their home eg widening doorways.
As I use crutches when not at home some of these things are important but other aren’t. I’d prefer to see what hosts actually mean by “accessible” rather than an impossibly ideal (for most) standard only hotels can meet. If I travel by car within Australia I take a shower chair with me and have asked the doorman at a 5 star hotel to carry it in for me since “accessible rooms” really means suitable for wheelchair users not necessarily folks who normally wear AFOs (leg braces) but take them off to shower.
On the downside I don’t think many disabled people travel much. Motels and hotels in Australia are required by law to have an accessible room which I usually book and when I arrive they open it up and it has a musty smell because “nobody ever books it”. A bit chicken and egg I guess. If you think about it just because there are wheelchair accessible toilets at service (gas) stations someone in a wheelchair still needs to get out of their car and into one. Sadly I think most people with disabilities just give up. I on the other hand have caught the train from LA to Albuquerque and driven back and the train from Danang to Saigon. I usually give up washing for a few days though.