How does a country effectively enforce this? Below is how they propose doing this. If you don't have any form of verification of your actual age, it's seems like they are just going on what the user says ( self reports). How can a company be found liable if a used lies about their age?

>the days leading to the ban, some teenagers said that they were prompted to verify their ages using a facial analysis feature, but that it gave inaccurate estimates. The law also states that companies cannot ask users to provide government-issued identification as the only way to prove their age because of privacy concerns.