The fine is for the entire EU, it was only handled by the Irish authority because TikTok headquarters are there.

The article says the Irish agency is enforcing this for the entire EU. I think this is called the "one stop shop" solution which a lot of large foreign companies and Twitter use to avoid being fined by each member state individually. It also involves some closer oversight I think.

I'm explicitly saying Twitter not X Corp because Musk in his infamous wisdom fired everyone at Twitter Ireland who was involved in ensuring they remained compliant. I think part of the requirement was also that every feature launch is run past the Ireland team to make sure it doesn't violeate EU data laws. Musk has not done that for any of the changes he introduced since the leveraged buyout.