Meta is lobbying to get age verification installed at the OS level so that they don't have to bear the cost themselves. I know nothing of the $2B but the fact that Meta influences the legislation can hardly be denied:

During the meeting, Meta executives, including Antigone Davis, global head of safety, are understood to have argued that any age checks should be handled on a smartphone operating system rather than by the likes of Meta.

https://www.yahoo.com/news/politics/articles/meta-urges-labo...