TBH, I think this should be prosecuted as a felony. In the past, fines have not proven to motivate Meta to change.
I'm thinking of how organized crime ('60s - '80s) were untouchable, and how prosecutors learned how to use then new RICO laws to bring (some) of them down.
> Any person who, under circumstances or conditions likely to produce great bodily harm or death, willfully causes or permits any child to suffer, or inflicts thereon unjustifiable physical pain or mental suffering... shall be punished by imprisonment in a county jail not exceeding one year, or in the state prison for two, four, or six years.
Of course the bar for a criminal conviction would be much higher, but the vulnerabilities are certainly there.
As with tobacco, social media target all children. Not just these plantiffs in MS.
The tobacco settlements in the USA didn't protect the rest of the world. Further, the purveyors just pivoted.