Is Virtualbox Apple silicon ready?

Not yet !

VirtualboxVirtualbox
Apple silicon status: Might never be supported !
The app doesn't work with Rosetta 2
Additional info:
If you go into setting after creating a virtual machine you'll see that it has an error at the bottom saying that the virtual acceleration setting isn't working. 6.1.18 introduced Multiple optimizations for BigSur

Is Apple silicon ready for Virtualbox?, Rosetta 2 support for Virtualbox