A fair question is why this fork of coreutils is required when the original Rust rewrite (https://github.com/uutils/coreutils/) supports Windows, in addition to Linux, macOS and wasm.
The reason seems to be a few windows specific fixes (https://github.com/uutils/coreutils/compare/main...microsoft...) which can probably be upstreamed into the main repo.
So “supports Windows” doesn’t mean supports Windows.
The original one is not virtue signaling enough
Apparently the creator of the fork is also a maintainer of some uutils repositories.