Good, it is a start. And much better would be for those EU politicians, journalists and other people to move to Mastodon, Pixelfed, and similar independent platforms. That would make a much better example.
I can't understand why government offices for many countries are still on Twitter. At least Germany has their own mastodon service, but my home country Finland still uses Twitter.
In my experience it is the other way round. The reason people are on Twitter is because politicians are there. If they move the journalists and politically interested will quickly follow.
That's a pretty bad argument. For one the majority of people are on neither. For two, it's almost always about reading, and twitter doesn't let you read posts without an account.