I want a law that requires publishing your API for apps like this as well as allowing users to crate their own frontend based on it. That would enable more privacy aware versions of these apps.

https://en.wikipedia.org/wiki/Magnuson%E2%80%93Moss_Warranty... from 1975, but is has more of what you were asking for than you might guess. And it was written about info-tainment systems (radios).