I'm sure this will be unpopular here but... I believe every country should be able to enforce their laws as they see fit.
Currently, US defaultism is everywhere. It's coercive that the US embeds their laws (DMCA, copyright) into trade deals. Unfettered access to users world-wide will no longer be assumed.
Anonymity has created transnational real-world problems like: hate, luring, incitement to violence/suicide, gambling, etc.
It's high time Internet borders are enforced like physical ones. And that media company officers answer for what they publish on the Internet.
So next, they will issue those nice government-controlled digital IDs that are "optional".
I get it. You're worried about gov't overreach and tracking. This is unjustified paranoia in a democratic society as you have input here through elected representatives who shape laws. Fix your democracy if you don't trust your gov't. IRL you can't get anywhere without the gov't knowing who you are; eg. SS#/SIN, credit card, passport, drivers license, bank card, etc.
Just like plastic IDs, Age of Majority verification that doesn't reveal real identity nor facilitate tracking can be engineered (and that doesn't rely on 3rd party for-profit nannies). There are Internet RFPs for everything. Propose one that just meets the need and it may be adopted world-wide. Otherwise, the risk is every jusidiction imposing their specific solution.
Non-US, western gov'ts will be tightening screws as their voters are demanding action.
The agreements that your country signs with other countries are up to you and your countrymen.
I assume you trust your government when it agrees to those terms, or you're working to fix your democracy.
I see no reason for countries not to defend their intellectual property in their negotiations. I'm not a fan of copyright and patents, but those are part of the legal systems of various countries, so why shouldn't they defend them like borders?
From my perspective, I prefer, as much as possible, to be my own choice. In my view, the US Constitution gets something very right. It does not define any rights of people but only the limits on government.
I don't expect you to know all of this as I don't know everything about the history and views of all other countries. There are two concepts woven into the fabric of the US.
1. All rights belong to the people
2. Government can't be trusted and must be controlled, not the people
What you see is as unjustified paranoia, I see is infringement on my rights. So as you've indicated, that's what I convey to my representatives.
Now that maybe that's a bit clearer. Do you feel the age verification in OSes is a good thing, and you're arguing that, or are you suggesting that these laws might work their way into your country when you sign trade agreements? I'm honestly unsure.
EDIT:
I'm worried this is turning very political, and I'm just going to get out now. I'm leaving my rebuttal above, but I'm not going to pursue this any further, as I don't see it as in the spirit of the rules or likely to prove insightful for the new laws the topic brought up.