We have a bunch of monthly reports that need to be completed errr monthly.

Generally these are Excel files on MS Teams sites in a fixed format / layout. These then automatically get pulled into PowerBI for rolling up and analysing by a myriad of angles. Generally done on trust and works 99% of the time but chasing in this or that is just tedious.

Is there a simple add-on in MS or using Flow that can be used to request the updates and send a reminder or similar to those who didn't hit the deadline or a simple visual flag showing those complete / incomplete?