The status of a DAG backup can be empty if the restore is initiated from a node in the DAG
When you restore databases or granular items of a database availability group (DAG) backup, the restore status may appear empty from the Backup, Archive, and Restore (BAR) interface. The status is empty if the restore is initiated from a node in the DAG. You should initiate the restore from the active DAG node or a NetBackup server to properly see the activity status.