VM network in QEMU on macOS works nicely. Unfortunately, the IO is not very performant, and that becomes apparent, e.g. when you run the k8s cluster with all the services that I described in the guide. The CPU usage becomes way too high for an essentially idle system.
The IO is much better with Apple's new "Virtualization Framework" (e.g. when using Lima with `vz` VM type - https://lima-vm.io/docs/config/vmtype/#vz), but unfortunately it does not support setting up a shared VM network - only bridged or single-VM NAT.