Enable Side By Side Stereo Mode

I'm trying to enable side by side stereo mode in my AR glasses but for some reason I just can't get it to work.  Everything just shows up as one big display (stereo mode is 2560x720 with the left half of the screen for the left eye and right for right eye). But I don't see one image for left and one for right like you'd want for stereo.  Instead I have just the display split down the middle.  In other words if I show a cube, it should show the right eye perspective of the full cube and the left eye perspective of the full cube.  Instead I see half the cube in the left, and half in the right as if I never even enabled stereo at all.

I have unity 2019.3.0b3 and upgraded to Vuforia: 8.6.7.  I'm deploying to Android 8.1

In Player settings I have:

Vuforia Augmented Reality Supported checked

Virtual Reality Supported checked

Virtual Reality SDKs = Vuforia

Stereo Rendering Mode (tried Single and multipass)

Under Graphics APIs I have tried Vulkan and OpenGL3

For the Vuforia Camera Settings I have:

FOV 18

Stereo separation 0.035

Stereo Convergence 4

Target Eye Both

For Vuforia Engine Configuration

enable video background unchecked

Am I missing something?  Should I add another camera or something and have it target left and right?

Thanks!