Moving my comment to the answer section (oops)
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Hi there Anne,
You should be able to create a scheduled event that calls a microflow. When you set of the SE in Studio Pro, you can choose the cadence in which you desire it to run. In your 'Task' retrieve you should be able to use the 'addDays' function to retrieve a list of Tasks based on some logic around a DueDate... although I don't see a DueDate defined in your Task entity in the screenshot.
For each Task you retrieve you should be able to loop over and retrieve your User that is associated over the 'AssignedTo' association. And use that information to trigger your email sending logic/flows. Let me know if that is helpful or not :)
Best, Micah