At least Florida’s SB 868/HB 743, “Social Media Use By Minors” bill isn’t beating around the bush when it states that it would require “social media platforms to provide a mechanism to decrypt end-to-end encryption when law enforcement obtains a subpoena.” Usually these sorts of sweeping mandates...
The idea that Florida can “protect” minors by making them less safe is dangerous and dumb.
I assume this is less about protecting children as protecting the movement from children, as well as facilitating wrongdoing against children by members of the movement.
As a general rule there are no backdoors that are good guys only. In fact predators, foreign agents and industrial spies will know them sooner than their distribution to law enforcement.