Good, other governments should be doing this. (But even if they use threads instead, mastodon users’ll see their updates anyway if mastodon feds with it)
Threads might, but it's more what instances will federate with threads - I think government and news organisations would do well to federate for better reach - that way any announcements they send out can have the largest reach possible. However major and minor mastodon user instances should probably not do so in order to prevent issues with takeover and EEE