A neighbour is currently advising several governments (including the Uk) and many corporates about child safety online protocols. Her opposite number in Australia is supposed to be the top person in the field and told their government not to bring in an age ban as the kids would just ignore it and find a way (they did). My neighbour is Greek and they are also planning to do the same as Australia even after she told them not to.Australia are doing things to restrict access to minors. The EU system is going to require even minors to be identified and monitored for everything they post. In China, apparently such monitoring of every citizen is sinister. But I guess it's fine in the EU. Australia do not monitor everyone's posting or messaging as far as I'm aware. The EU system will. One is to restrict access for minors, the other looks like an attempt to control the narrative.
There isn't a simple solution, kids will always find a way around these things (it's a dare). Corporates need to do more to stop nasty stuff being available in the first place.
My neighbour pointed out that to politicians banning something is very attractive as it smacks of tough action "we care about our children". They can then move onto to the next problem. They don't want to hear someone say there is not easy one size fits all solution.