How to use passthrough and post processing simultaneously?

I make some program in VR Reality - or rather Augmented Reality. Passthrough works well for me, but I’d like to use post processing too. How can I do that? I try everything.
Everytime I check postprocessing in camera, passthrough stop working. I try use postprocessing only for foreground (using the camera stacking, but I cannot make camera overlay work).

Can somebody help? How should I do that?


did you find any answers by any chance? :}