runq is featured in IBM's documentation

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IBM's Securing Your Critical Workloads with IBM Hyper Protect Services guide references runq as a foundation for the SSC (Secure Service Container)

SSC is a container technology that is a runq-based, virtualized Docker container
environment that provides containers isolation and data protection on top of the IBM Z or
LinuxONE servers

runq is a specialized Docker runtime environment that is used to create a dedicated Quick
Emulator (QEMU) VM for each instantiated Docker image. It also provides a dedicated
guest OS kernel for each of those QEMU VMs, which are later used as the runtime
environment for workloads.
It is an open-sourced hypervisor-based Docker runtime environment, which is based on
runc to run regular containerized images in a lightweight kernel-based virtual machine
(KVM) or QEMU VM.