With an account on social.network.europa.eu you'll be able to follow people on any Mastodon server and beyond.

EU Voice provides EU institutions, bodies and agencies with privacy-friendly microblogging accounts that they typically use for the purposes of press and public relations activities. Institutional accounts can be requested from tech-privacy@edps.europa.eu.

The Mastodon developers maintain a list of Mastodon communities open for registration.