@radicalgeek I had a plugin called "share to Mastodon" which shared WP posts to Mastodon; then, another one "enable Mastodon apps" by Alex Kirk, which should enable to post on WordPress through your Mastodon account. But that didn't work for me as I couldn't truly interacting on it. Which worked together with ActivityPub plugin.
But as far as I know, ActivityPub plugin's author, @pfefferle and his team, are working on the complete integration of WordPress as a Fediverse actor. But, as far as I know, there is not (yet?) a way to link WordPress and Mastodon in order to interact with one and the other from the same place. If that's what you asked. Otherwise, sorry for intrusion.
#ActivityPub #mastodon #WordPress