Ask Experienced Devs

Apologies if this isn't the right place to ask this, but I thought actual developers with a deep understanding of how technology actually works would be the people to ask!

If you were tasked with setting up a safe and secure way to do this, how would you do it differently than what the UK government is proposing? How could it be done such that I wouldn't have to worry about my privacy and the threat of government suppression? Is it even theoretically possible to accomplish such a task at such a scale?

Cheers!

EDIT: Just to be clear: I'm not in favour of age verification laws. But they're on their way regardless. My question is purely about the implementation and technology of the thing, rather than the ethics or efficacy of it. Can this seemingly-inevitable privacy hellscape be done in a non-hellscapish way?