IMHO, the EU should have done this yester-five-years-ago. It's absolutely baffling they haven't already, considering they're going to outlaw ICE cars in just 6 years time, yet we don't yet have friggin EV charging regulations in place to ensure it always just works for evryone.
I assume politicians are too busy with the inflation/CoL, wars, migration and how to win the upcoming elections in 2024, to worry that we'll be caught wither our pants down on the EV infrastructure side in a few years, because they've been asleep at the wheel.
Mark my words, come 2029, and everyone's gonna freak out, there will be outcry from the voters, and the ICE ban will be postponed for 5 more years so we can get charging infrastructure sorted.
I wouldn't expect any standard becoming a legal requirement until one with open specification becomes available and a significant part of the industry has switched to it.
It took them the better part of a decade just to bring Apple to the table on USB. I don't have the same faith you do they're going to be able to even partially repeat this success in a much more diverse ecosystem like vehicles.