I suppose this is something else than the Hypervisor framework (https://developer.apple.com/documentation/hypervisor) - its successor or a convenient complement? Does anyone know if there's a convenient command line utility for wrangling VMs built on this framework?

This is higher-level than the Hypervisor framework; this Virtualization framework providers an entire VM with virtio peripherals including a display.

https://github.com/lima-vm/lima can use Virtualization framework for creating VMs, there is also https://github.com/gyf304/vmcli as a very simple CLI utility for running VMs, though it's not very actively maintained.