Add a "create task" action for posts in Microsoft Teams. For a post, when you click on the ellipsis and "More actions", the Planner "create task" action opens a card with the content of the post as the task description. The card lets you add a few other details for the task and if you save, would reply to the post with a link to the task just created.

The card should be kept simple. Focus is on quickly capture the content of a post into a task and make it visible that a task has been created. The details can always be changed in Planner.