Virtualisation on Apple Silicon question :

I know there was a developer preview release of VirtualBox some time ago (about a year?) so people could fire up virtualbox VMs on their M1/M2 chip based Macs. But looking at virtualbox.org today, this seems gone/discontinued? 

Also I note VMWare does exist for Apple Silicon but it's not really free (there's a "personal use" edition, I think which is FOC but not quite "free").

Is there a Free vm hypervisor for Apple Silicon?