The ChunkMapMixin is redirecting RandomState#create.
Why not inject at return and use a RandomStateAccessor set the values instead of replacing the object?

Can you push the latest code so that I can contribute?

I don't see why this would matter? It gets applied the same either way, and WrapOperation means it won't break if another mod mixins the same method.

It's redirecting on 1.20.1

It's far more effort to move off of a @Redirect; The object has to basically be reconstructed. Unless you have a specific use case where this breaks another mod, it won't be fixed.

What's to reconstruct? WrapOperation or Inject is enough to modify the field like how the Lithostitched do it now

You can't simply swap out the noise router in the random state, all the noise router fields need to be mapped/visited again and several fields need to be re-accessed. It's a hassle. Hard to explain without showing the code which I can't access at the moment.