Unity Universal Render Pipeline modification

I am an independent game developer / entrepreneur - I would like to modify the Unity game engine URP multiview forward renderer to keep the opaque+transparent render results for use in the next frame's shader calculations. (This is for mobile VR so traditional deferred rendering and/or Blit operations within a single frame are not suitable as they will cause too many resolves from the GPU to system memory) This will require good knowledge of Unity, OpenGLES3 and tiled rendering architecture. See attached document for more info on proposed method for achieving this... However I am open to discuss different approaches if they are more efficient.