Planner integration with Microsoft Teams
The tab integrations is not enough, activity in the channel is essentials. Things like task completion or new task in the conversation is a must.
David Lozzi commented
Try using Flow?
Would love to see some integration from a notification standpoint (where following the Channel means you are subscribing to Planner notifications as well).
Also, not sure if anyone else has reported this, but there is also a bug where you have to actually go to Planner and open the Plan before you can add it as a tab in a new Team.