Thanks for this request. We are rolling out the links to planner boards for groups in Outlook desktop from the group card, so that should help get to the planner task list.
This request seems to be asking for the Outlook desktop tasks list to also show planner tasks. Can you help us understand the use cases and details on the actions you expect to perform with planner tasks in Outlook?
Thanks for the feedback. We are planning to bring group calendar to Outlook iOS and Android app in the near future.