Feature Request - Due Dates for Sub-tasks in Microsoft TO DO

It would be really great if there were a way to have due dates for sub-tasks placed in Microsoft To Do.  Right now, that is the thing keeping me with Asana. This is also what has prevented me from using the Microsoft Planner.  

I find that I have one main task, but frequently have multiple sub-tasks to accomplish the one task. (Welcome to the wonderful world of HR management!) It is often impractical to create a brand new list for each task, so the ability to have due dates for sub tasks would be a great addition. 

Thanks!