The only businesses that are required to provide facilities are ones that serve food. Most fast food joints already have single commode ADA compliant style restrooms anyway.
A lot of businesses with older facilities take out their two separate M/F toilets and replace them with a single ADA family restroom to conserve space and money when they update.
Our auto repair shop doesn’t have a public restroom at all. Just a use at your own risk “mechanics” washroom with a toilet, sink and an eyewash station and an exposed water heater, all covered with soap and grease splatter. Probably hasn’t been updated since 1960.
I dream of installing one of those hoseable stainless steel units like they have at truck stops, LOL.