hey @camilagarciabustos
I think your best bet might be the planner API:
https://docs.microsoft.com/en-us/graph/api/resources/planner-overview?view=graph-rest-1.0
It may also be worth looking at the Office365 tool, as i know you can import Office Calendars from there, but from what i understand that is not the same as pulling Microsoft Planner. This may require a custom tool. If you need any help with the building of that let me know.
Cheers,
TheOC
