They do, actually. For example the French government has its own Matrix platform https://www.tchap.gouv.fr/ https://www.tchap.gouv.fr/ and its own Mastodon ins

They do, actually. For example the French government has its own Matrix platform https://www.tchap.gouv.fr/ https://www.tchap.gouv.fr/ and its own Mastodon instance https://social.numerique.gouv.fr/ https://social.numerique.gouv.fr/.