The American Disability Act does not give anyone permission to not wear facial barriers. It does not matter if you have some anxiety disorder that makes you feel if you wear a mask you will suffocate. The ADA requires reasonable accommodations. It does not require that the needs of society completely bend to someone's disability. So if you can't wear a mask then you must wear a face scarf or a face shield or a motorcycle helmet with the shield down. You have
no right under the ADA to present a risk to the general public.
If you have the disability of alcoholism, that does not give you permission to drive.
There have also been posts stating that no one can ask a person about a disability. That is also not true. Businesses have specific language they are required to use. The general public is under no such restraint and any person can ask you anything. This may certainly be rude but it is not an ADA issue.