Looking forward to hearing Tailscale getting forced to do age verification and banning use of this to people under 16 years old in Australia under their new social media rules...
Personally, I think they will go for the endpoint instead. This is part of the UK proposal now. Only allow "trusted" endpoints to access services, something which is kinda in place in the mobile world already. Many things are blocked if you are running an unsanctioned build of Android.
Then once they have that in place they can just do all the monitoring through the screen of the device itself, since all content has to pass through there.
It's much easier to do that than to try to mandate a backdoor to every service in the world. Of coruse it is even more disastrous to user privacy but I honestly think that's the goal not the bug.
Not being able to control the endpoint, like an operator can with a mobile phone, infuriates the police and politicians here. I don't want to go "full Stallman" here but although they do not use exactly these words... the idea of a general purpose computer you own and can program bothers them. Ironically at the same time they want a tech industry and tech jobs and young people entering the workforce with "tech skills". Keep in mind though that until relatively recently they though "tech skills" was being able to us MS Word. Thankfully the RPI helped a bit with that.