ApplicationSet spec to iterate over a list of charts available in the Git Repo using Git Generator: https://argo-cd.readthedocs.io/en/stable/operator-manual/applicationset/Generators-Git/

instavote-dev.yaml

apiVersion: argoproj.io/v1alpha1
kind: ApplicationSet
metadata:
  name: instavote-dev
  namespace: argocd
spec:
  generators:
    - git:
        repoURL: https://github.com/initcron/instavote-gitops
        revision: HEAD
        directories:
        - path: "charts/*"
  template:
    metadata:
      name: '{{path.basename}}-dev'
      annotations:
        debug.path: '{{path}}'
        debug.path.basename: '{{path.basename}}'
    spec:
      project: instavote-dev
      source:
        repoURL: https://github.com/initcron/instavote-gitops
        targetRevision: HEAD
        path: '{{path}}'
        helm:
          valueFiles:
            - env/dev.yaml
      destination:
        server: https://kubernetes.default.svc
        namespace: 'instavote-dev'
      syncPolicy:
        automated:
          prune: true
          selfHeal: true
        syncOptions:
          - CreateNamespace=true