I installed rancher in eks with an helm chart. rancher installed the rancher agent related components in the cluster. when I uninstalled the helm chart the rancher server components are gone but the agent components are still there in the cluster. Is this the expected behaviour?

No, it’s not. The components should disappear if you uninstall Rancher in a clean way with Helm. However if something went wrong, check the docs here to clean up your cluster

Thanks