Try portainer!

clusters/kind/flux-system/apps/portainer.yaml

@@ -0,0 +1,12 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
+kind: Kustomization
+metadata:
+  name: portainer
+  namespace: flux-system
+spec:
+  interval: 10m0s
+  path: ./apps/portainer
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: flux-system

clusters/kind/flux-system/kustomization.yaml

@@ -3,3 +3,4 @@ kind: Kustomization
 resources:
 - gotk-components.yaml
 - gotk-sync.yaml
+- apps/*.yaml