Interesting, I hadn't heard of this. First impression skimming the docs is that they've gone to significant trouble to make it not generically useful as a FUSE replacement but I could be misreading.
Not macOS directly, but there’s fuse-t which works in userspace and just creates an NFS server which it automatically mounts via macOS-own capabilities.
The library is a drop-in replacement for libfuse and works great for me.
Didn't the latest MacOS update add something similar with userspace filesystems