I am sorry, but I dont believe that casually raising an issue here or there will actually change anything. My experience is that it either gets ignored, or you outright receive an aswer that explains to you that your needs are not important.

Example 1: Reddit is on GitHub. At the time when I was still using Reddit, I was pretty pissed with its lack of helpful accessibility. So I went on GitHub, and wrote a PR which would wrap individual articles on a page in a so-called "region" so that the screen reader could easily jump to the next article. The PR was ignored for several months. After a while, I simply closed it out of frustration.

Example 2: When I read about Bitwarden on HN, I tried it. As I am an iPhone user, the iOS app was interesting, so I installed and tested it. No surprise, almonst no button was labeled correctly, or labeled at all. So I opened an issue on GitHub. The answer I got was: "Yes, we know we are not accessible, but we are planning a rewrite anyway, so we will not change anything in the existing code". Thanks for nothing. We are not talking about rocket science here, just adding a text label to a handful of buttons. But yes, thanks, I got the message. Nobody really cares about people with disabilities.