There are a lot of GOP-controller legislatures in the USA pushing through so-called “child protection” laws, but there’s a toll in the form of impacting people’s rights and data privacy. Most of these bills involve requiring adults to upload a copy of their photo ID.
A handful of states can require that, sure, but requiring is not enough. All the browsers and all the porn sites need to follow that and this is not going to happen
If the goal is to make sure there’s age verification for users of some porn sites with some web browsers - yea, you can totally achieve that. A workaround is a) switch the website or b) switch the browser. That’s security theater though. Wastes time and money, fails to achieve the goal. If the goal is to make sure age is tested for users of all the porn sites for users of all browsers - this goal cannot be achieved without massive effort.
They have internet with porn in it in other nations :)