Hi all,
M1 and M2 architecture currently do not have support for 64 bit atomics in the HW, so we are unable to implement Nanite, and Lumen with RayTracing at the moment. Lumen without ray tracing should work, but if you are seeing specific issues please let us know through the bug report system.
We are hoping the upcoming M3 architecture will support this but we are still waiting to see before we commit to how we go about implementing these features further.
Thanks,
Jon