For personal activity logs, !ObsidianMD@lemmy.world with a synced folder. It could probably work for a team too.

In addition to the ActivityPub plugin, I would add the Friends plugin. When you have both, Friends will let you follow and respond to people via your WP site. At some point I want to make my Masto account followers-only and make my WP blog my public ActivityPub identity.

A highly opinionated guide to learning about ActivityPub