Based on this comment , the supported way to list all resources is to iterate through all the api versions listed by kubectl api-resources:
kubectl api-resources enumerates the resource types available in your cluster.
this means you can combine it with kubectl get to actually list every instance of every resource type in a namespace:
kubectl api-resources --verbs=list --namespaced -o name \
| xargs -n 1 kubectl get --show-kind --ignore-not-found -l <label>=<value> -n <namespace>