sudo snap

install multipass

-classic

To work correctly, Multipass requires access to the CPU
virtualization extensions. If the extensions are not
available for your CPU architecture, not enabled in BIOS,
or not accessible (for instance if you are running a
virtual machine without nested virtualization),
you won’t be able to use Multipass.

If you see the following error, you should use LXD:

launch failed: CPU does not support KVM extensions

Install LXD

To install LXD, use the following command:

sudo snap

install lxd

LXD can be used as an alternative backend during the
snap build process. Once installed, LXD needs to be
configured for use. The default answers are suitable
for most use cases.

sudo lxd init