I am having limitations with the Meta Depth API Shader for AR

If I want to use any shader affect on an object in AR I can't use the Depth Shader and then you see the objects through my arm. What is the best way to combine two custom shaders? I want to use another shader that creates an invisible material that still receives shadows. I will probably need to combine multiple shaders with the depth shader one in the long run. 

Here is the link to the depth shader: https://github.com/oculus-samples/Unity-DepthAPI/tree/main