You can use custom reporting periods to report on project level progress towards Progress Trackers.
Every project has a Table that displays the target and progress for every Progress Tracker
You can use Periodic Reporting even if you have not set targets for each Progress Trackers. Simply create the Periods but leave the target cells blank for each Progress Tracker.
Get started with Periodic Reporting in 3 steps
Optionally set targets for each Progress Tracker in each period
Access the Table view of the Progress Panel to see progress within each period