How do I make the UMG available AND interactable on Spectator Mode?

I saw that Robo Recall has two displays while the game is playing. One where the game is played on the HMD, and one where there is some sort of score displayed on the desktop monitor.

Does anyone have an idea of how to do this?

*edit: Just found out about Spectator Mode. Now the question changes to, how do I make the UMG available AND interactable on Spectator Mode?