They're not focusing on sites like FB, because using them isn't a requirement of any meaningful task.

Lawyers are definitely going after things like companies' job sites. Applying for a job is a protected action and no discrimination is allowed, either intentional or not.

No, but there more and more lawsuits filed every year over website accessibility issues.

https://www.adatitleiii.com/2019/01/number-of-federal-websit...