ITS SOLVED. You have to attach it to an actor otherwise it wont show up.
The scoreboard device is not showing up when testing the map in a private version or in a unlisted public version. So the device doesn’t show up after publishing the map. But it does show up in a UEFN live edit session.
See screenshots.
This is the last issue before I can publish the map, anyone able to help? There are barriers around the location.