Which was closed, of course. It’s a political shitshow right now. Amsterdam municipality already runs its own Mastodon, and this fuckup will probably have consequences in moving official broadcast channels off Twitter.

Germanys gov runs its own Mastodon instances - social.bund.de - where the cabinet, the ministries, state institutes etc have their official accounts.
Some non-political examples are: The German Weather Service, the German Aerospace Institute, and the Consumer Protection Agency.