Clarification on Wave SDK and Vive Business Streaming

[CREWvzw]

Hi,

I recently purchased a Vive Focus 3 and I would like some clarity on certain aspects. I am currently working in Unreal Engine 4.27 and 5.1.0

From what I understand, the Wave SDK is aimed at standalone applications running on the headset. Is it possible to use features from the Wave SDK, such as passthrough underlay/overlay, when using Vive Business Streaming? Or am I then limited to OpenXR implementations?

Is it possible to test and develop these features without constantly creating new builds? According to the documentation for VRTestApp, I can run VR Preview with it. However when I do that, I have no controllers and when running the Passthrough Overlay sample, it does not work. Is it because I am working in an OpenXR context then?