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...
Hashtags are a thing but you need to find people to follow who are boosting others post.
The most important is to find groups about your interests. Groups are accounts to follow who will boost every post mentioning it. This will help you to find interesting account to follow.
Boosting is important has it’s how people discover new content.