A number of governments (France, Germany, Switzerland, Netherlands), international organisations (The European Union, The Council of Europe, W3C etc), public broadcasters (ZDF, the BBC, PBS/NPR affiliates etc) have set up servers or accounts on the Fediverse.
Please ask public services in your country/region/area to follow their lead. I can do a shoutout on @FediFollows to help get them started.
Musk's Twitter hides all its accounts behind a sign-in page, so it's no longer a public channel.
What are some links to governments (like Switzerland, specifically) on Mastodon?
I've published some on my @FediFollows account recently (at https://social.growyourown.services/@FediFollows/111863392225131070) and you can also find them on my website https://fedi.directory