This is certainly a growing trend which was first started amongst end-users themselves, and slowly we've seen a few news media outlets also following suite. So far, only a very few government agencies have actually followed. Coming to mind are also The Netherlands. What is attractive for many organisations and agencies on Mastodon, is that...
A dozen today, 13 tomorrow, eventually more people will know about it and join. You don’t have to go that far back for governments having any social media presence at all being a very weird thing.