CreateZEDRigDisplayer & isStereoRig not working

Preliminary Checks

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[X] This issue is not a question, feature request, or anything other than a bug report directly related to this project.

Description

I have a main project (not on my github) that has unityXR and ZED 3.7 (tested this in 3.8 as well) as well as other packages and 3rd party stuff while this issue is also able to be reproduced in a 100% clean project that has no other packages other then openXR (unityXR) & stereolabs package (SDK IS installed) where, even though i am using the ZED_Rig_Stereo prefab, it is not identifying itself and therefore not creating the ZEDRigDisplayer (tested with show AR Pass-through AND Show Final AR Rig off and on simultaneously and independent of each other)

I placed two Debug.Log statements where i found things to be breaking

isStereoNotWorking

Steps to Reproduce

confirmed Index headset is connected & working in Unity XR Toolkit
add XR Origin (from unityXR Toolkit) to scene
add ZED_Rig_Stereo prefab to scene
Stream device & play ...

Expected Result

ZedRigDisplayer to be created with the combined screen and have the quad created that uses the two eye information from the material.

Actual Result

can see the zedmini working with both eyes but ZedRigDisplayer is never created

ZED Camera model

ZED Mini

Environment

OS: Windows 10
CPU: Processor  Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz, 4008 Mhz, 4 Core(s), 8 Logical Processor(s)
GPU: NVIDIA TITAN Xp
ZED SDK version: 3.7.2 AND 3.8 
ROS Melodic
Unity 2020.3 LTS

Anything else?

can confirm this works as intended in 3.3 with unity 2019

stereolabs / zed-unity