Stereo Material in 5.3 and above not working?

We successfully used ResolvedView.StereoPassIndex (as described in multiple forum posts) to modify a material in the material graph based on the left/right eye in a stereo setup in UE 4.27. We could not get this to work in UE 5.3 through 5.7, but found no posts or reports that mention any change in the behaviour of this property. Other stereo techniques such as different view frusta in ndisplay based on left/right eye are working as expected, in multiple stereo approaches (side-by-side, frame-sequential).

Has anyone gotten this to work in these newer versions?

Reference is the M_LeftEyeGreen_RightEyeRed material from the VR template.