Batching drawcalls for runtime generated gameobjects

I am trying to build an application for Occulus Quest where I take in the 3D geometry data through a streaming web socket connection from a server and build gameobjects, meshes etc. at runtime in occulus. The vertices, triangles, lights etc. are received in a JSON format which is then parsed by my application to build the 3D geometries and render it. I am using:

Unity Version - 2019.3.2f1 URP Version - 7.1.8

Since I am limited by hardware resources I want to reduce my drawcalls to the minimum. I have been trying to implement batching both static and dynamic to reduce my hardware load. I have been using the profiler to observe the performance of my application and I figured that the application is CPU intensive (Most of the time is spent on Gfx.WaitforRenderThread) and has a huge number of draw calls. I have attached the profiler images as well.

![alt text][1]

![alt text][2]

I have tried the following things to reduce draw calls

1. Using StaticBatchingUtility Combine method to combine gameobjects.

2. Applying shared materials - The way I am applying materials to my game objects are as follows: I instantiate a material object for each material of a different kind and I apply those materials to the renderer component through renderer.Material = materialInstance. Note that materialInstance is the same for all materials which share the same property.

3. Mesh combine to combine similar meshes into one
   
   I am trying to use mesh baker right now. But I have no clue why the batching is not working here (both static and dynamic)
   
   I Understand that dynamic batching requires the vertices to be less than a certain threshold but I see no batching happening at all.
   
   Can anyone point out what am I doing incorrectly? and what are the ways to optimize performance for such an application where the geometries etc. are being created at runtime?
   
   I have tried almost all the suggestions mentioned on forums and blogs without luck.
   
   [1]: /storage/temp/153439-profiler-cpu.png
   
   [2]: /storage/temp/153440-profiler-render.png