to be fair, UK has only started testing it this year, and when they did it only worked on one of my mobile phones with my work SIM (slightly higher priced business grade contract), I didn't get any alert on the pay as you go SIM on a budget network that I use for a backup..
I have them enabled and travel all over Europe. Only in northern Italy have I received those (a test message as you sign into their cells for the first time after a while, looks like).
Other countries might implement them but I've never seen one. Instead they do the silly and expensive one-by-one spam. 🤷
Anyway, the way to get this given proper attention is to get in touch with your MP and ask them to raise the issue with your government.
Instance de l'association G3L basée à Valence, Drôme, France