What’s the possibility and legality of something like getting implemented in the US?

I’m pretty sure that every Android Lemmy user has a Custom ROM installed on their device. Currently daily driving GrapheneOS on my Pixel 7 Pro.

I’m going to come off as retarded but I have to ask: when did Signal get this bad rep? I remember not too long ago that it and Telegram were praised for their privacy practices. What happened for that to change?