I want to port ProtoSky to the latest version and I'm happy to help with it! It doesn't seem super complicated, but I'm stuck and I'm not sure how to map the mixins over to the new version.
https://github.com/DeadlyMC/ProtoSky/
As far as I can tell, we just need to remap method_51375, method_20614, and method_17033 from the 1.20 ChunkStatus to the new version.