After playing with Kubernetes on TrueNAS SCALE for a while, I also recommend against using it. It's incredibly unstable, doesn't support standard deployment functions (e.g. Helm) out of the box, and the slightest mistake with stopping/starting services will cause the Kube API to break. Much better to run a Docker swarm or spin your own k8s cluster with something like kubespray.
After playing with Kubernetes on TrueNAS SCALE for a while, I also recommend against using it. It's incredibly unstable, doesn't support standard deployment functions (e.g. Helm) out of the box, and the slightest mistake with stopping/starting services will cause the Kube API to break. Much better to run a Docker swarm or spin your own k8s cluster with something like kubespray.