It seems like a kind of a paradox that online video games are held accountable for servers that they have nothing to do with, but meanwhile a browser can be truly open and doesn’t have to employ any restrictions like age verification, or banning ips? Not even China goes after the browser level.
They aren’t. The restrictions are mandated by Microsoft, not governments.
They do have to take action in regards to their own Realms servers, but that’s it. Restrictions on random unaffiliated Java servers are either for brand image or other selfish reasons. For example, someone here mentioned chat for UK teens, that one is almost certainly to force ID verification into the game, not to actually comply with anything. It’s for data harvesting.