Kubernetes, also known as K8s, is an open-source system for automating deployment, scaling, and management of 
containerized applications.

K3s is capable of nearly everything Kubernetes can do. It is just a more lightweight version. 

Has anyone tried to port a Kubernetes (or lightwieght K3s version of a Kubernetes container to QNX?

References:
https://en.wikipedia.org/wiki/Kubernetes
https://docs.k3s.io/faq
https://www.kdab.com/wp-content/uploads/stories/Containers-in-Embedded.pdf