As far as I know none of the modern Linux
virtualization systems work on
zVM. The main difference between a zVM Virtual Machine and an LPAR is in
the management facilities.
Actually, KVM and qemu exist:
https://docs.kernel.org/virt/kvm/s390/index.html
https://qemu.readthedocs.io/en/v8.1.5/system/target-s390x.html
though why you'd use them instead of the VM or LPAR stuff on a z machine
is beyond me.
I imagine the usual linux cgroup&friends stuff probably works too, for
containerization.
De