My team and I are trying to get a better pulse on if any leads aren't syncing and why they aren't syncing.
Is there a way to pull a smart list or a report with thee qualifiers?
Not sure if I understood correctly, however if you want to see leads which were created in past week, but did not sync to SFDC, you can do this via the following SL:
For existing leads, we may need to see the Notifications
Hope it helps!