Currently, it seems that RealityScan’s page in launcher only actually works if if the Game Library is not hidden by the “Hide Game Library” option in the Unreal Page settings. This makes no user-focused sense.
I’m primarily an Unreal Engine user, and until RealityScan was rolled into the launcher, I usually kept “Hide Game Library” in the settings panel of the Unreal Engine section of Launcher checked. If that is checked, clicking on the RealityScan tab of the Unreal Engine section does nothing.
Also you can crash the launcher by being on the RealityScan page, opening settings, and checking the Hide Game Library button.
RealityScan is not a game and it’s place/functionality in the Launcher shouldn’t be impacted by the the Hide Game Library option.