From this doc page for "Using VR Compositor Layers" under the "Under Protected Content" section, it says that for Oculus Quest, in addition to selecting the "Protected Content" flag for OVR, we "must also render the OVROverlay layer as an External Surface and select Protected Content in Player Settings > Virtual Reality > Oculus."
I'm using Unity version 2019.4.2f1 for Linux - I have the Oculus SDK and XR Plugin installed. I cannot find the "Protected Content" setting anywhere in Player Settings. Is this instruction still relevant? Is there anything else still required other than selecting the option on the OVROverlay script?