The Sprint Backlog and Future Priorities worksheet, which you can bookmark, has active and archive tabs for each team. If a work item has been migrated to production, the column labeled "Migrated / Completed" will have a date entered. If the cell is blank, it has not been moved to production yet. The Archive tab has all of the details of the sprint commits where the entire sprint bracket has been delivered.
For optimal viewing, it is recommended that you click on the expansion arrow in the upper right hand corner of the Google Sheet above.