deploy-templates/templates/cluster-clients.yaml

{{- range $client := .Values.cluster.clients }}
apiVersion: kafka.strimzi.io/v1beta2
kind: KafkaUser
metadata:
  name: {{ $client }}
  labels:
    strimzi.io/cluster: {{ $.Values.cluster.name }}
spec:
  authentication:
    type: tls
---
{{- end }}