Forgive me if I'm mistaken, I've never used mastodon, but I expect part of the "federated" bit means being able to "follow" users from other Mastodon instances,

Forgive me if I'm mistaken, I've never used mastodon, but I expect part of the "federated" bit means being able to "follow" users from other Mastodon instances, including EU Voice. So you'd need just one account on a Mastodon instances to follow every EU government/institution announcements on EU Voice. If not on Mastodon, RSS feeds still exist.