Static meshes that use Nanite never write to RVT.
We've been recommending a workaround to create a secondary non-nanite mesh component that only writes to RVT, but that is a big overhead for productions.
We'd like the rendering to RVT, using the proxy mesh, to be automatic.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-174189 in the post.