I finally got the Planner+ToDo version of Tasks in Microsoft Teams. I'm disappointed to see that there is still no way of seeing an overview of all the plans/tasks that my team is working on. I have to click on individual teams followed by the tasks assigned under each team.
It's early days with this functionality in Teams. I'm certain it will evolve and improve, and if you want to recommend a feature improvement for this, you can do so at https://microsoftteams.uservoice.com/