All the bill wants is that you can set up an iPhone for kids, an children account on Ubuntu (YOU decide whether it's a children's account) and then, presumably, the browser vendors implement an AgeAPI that allows website operators to query the user age.
Your device tells us you're 10 years old. Access to Instagram denied. Your device tells us you're 16. You're not allowed to visit gambling-porn-and-industrial-accidents.org
It's, of course, exactly the opposite of the "identity-tied age verification government-control, ID-document-leak" dystopia that the scare crowds here are peddling. But you'll never hear a word of acknowledgement from them.
These people act as if those "I'm 13 or older, i can create an Instagram account and waste my life" or "I'm 18 or older, let me watch porn and strangle my girlfriend" buttons are the peak of civilization.