If you are a governement or bigco, accessibility is part of your baseline requirements. You must be able to say: Yes, we are accessible. Otherwise, the public will cause a stink.
So you take your list of vendors, and remove any that don't say they enable accessibility. Vendors know this and make sure they say they are.
Meanwhile, it is a hard to get right feature, only applicable to a small part of your userbase. Multiple disabilities require different affordances. No developer on the team really understands the actual requirement.
The people requiring accessibility will go somewhere else, or grumble and make do. Neither will be detected on any metrics board.
This combination promotes shelfware: Things you buy and put on a shelf somewhere but never really use.