In case anyone is looking for a solution for this still you can call
UBlueprintPlatformLibrary::SetAllowedDeviceOrientation(EScreenOrientation::LandscapeSensor);
to set the orientation
In case anyone is looking for a solution for this still you can call
UBlueprintPlatformLibrary::SetAllowedDeviceOrientation(EScreenOrientation::LandscapeSensor);
to set the orientation