High poly mesh rendering in path tracer but not in lumen

Hi
I have come accross a scene where I have a high poly model apx 2.2M poly and need a few tips on how to overcome this

I am trying to render it in lumen but its not showing up in MRQ and if i try path tracer there is a lot of jitter and noise coming along with it even after rendering it in 4096 samples

Is there any other way to do this in a faster way and in lumen?

Hi, could you share more details of how your scene is set up? Do your meshes/environment/lighting all live in one level or are you using level streaming? Do the meshes have nanite enabled? Are you rendering with hardware raytracing effects? What does your MRQ render settings look like? Lots of things could be causing your renders to fail.

The issue is fixed
I reimported the mesh with build nanite on and it did fine and rendering perfectly

Would appreciate if u could help me with the render setting as well