it is extremely simple

for instance, the government can effectively ban you from saying something they don't want you to say by forcing all companies that may provide any substantial platform to you to implement their code speech

that way they have enforced a ban on you by proxy

the same way they can verify/certify the id of people totally or partially when they go online, by forcing all vendors who provide the systems that you may use to go online to enforce it for them

and this law absolutely does that

So how is mandating the existence of a parental controls feature that?