It's open source software with a full commit history, you can literally always go back and it's impossible to prevent you from having that ability. The whole point of Linux is it can be whatever you want, there's literally zero way that any government could realistically control Linux, nor any way to implement a practical system to enforce age verification when anybody can bypass it in their install at any time.

Nobody can convince me that in a world were governments can't even stop non-anonymous piracy that they're going to be in any way effective at controlling an operating system primarily used by technically savvy people, which is primarily distributed by P2P software most used for piracy.