Go to Libraries > Supervisor Library and click on Advanced.
Click Display Options in the dropdown menu. The dialog box which appears contains an option to show archived items. When the toggle is off, the Supervisor Library view will not show archived topics. Turn the toggle on to show archived topics.
Once the archived topics have loaded, restore these by clicking Restore. Click Yes to confirm that you want to restore this topic.
This video (12 seconds: no sound) shows how to restore archived topics to the Supervisor Library.
Article ID: xapimedE_20200110_12