When I see things like "facial age verification", I have major concerns, whether we're talking about a site like Roblox (whatever that is — I don't know, and don't really care), social media, porn, or any other site. How are you going to do it without violating the privacy of every person who creates an account? And how are you going to verify that the person using the account is the person who created it without causing an even bigger privacy violation?
We do need some sort of age verification system, but we need it to be designed in a way that protects privacy. I have less than zero faith in any individual website to come up with such a system, and approximately zero faith in any individual government to do so. There really needs to be an international age verification working group that spends the next five years coming up with a system, then pressures everyone to implement it.
Doing it the other way around, with companies or governments shoveling bad, partial, or even dangerous solutions to the problem down everyone's throats, can only result in greater levels of push-back by the general public towards a proper scheme if someone ever creates it.