sync-configmaps-clusterpolicy.yaml

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: sync-configmaps
spec:
  rules:
  - name: sync-configmaps
    match:
      any:
      - resources:
          kinds:
          - Namespace
    generate:
      apiVersion: v1
      kind: ConfigMap
      name: hello
      namespace: "{{request.object.metadata.name}}"
      synchronize: true
      data:
        data:
          hello: world