No one prevents You from installing Linux in a Bhyve VM and running Docker there.

Overhead of FreeBSD Bhyve Hypervisor is about 0.5% (measured in benchmarks) so You loose nothing.

Here You have easy and complete jumpstart into Bhyve in FreeBSD:

- https://vermaden.wordpress.com/2023/08/18/freebsd-bhyve-virt...

Regards, vermaden