Postgres Azure policy for geo replication with tag override

postgres-policy.json

{
  "properties": {
    "displayName": "PostgreSQL should have Geo replication enabled",
    "policyType": "Custom",
    "mode": "Indexed",
    "description": "This policy  checks wheter Geo replication is enabled or not. You can exclude the database from the policy by adding 'noGeo' : 'true' as tag and value",
    "metadata": {
      "category": "SQL",
      "createdBy": "75e5f040-6c35-4bc7-baef-eae05fc48acb",
      "createdOn": "2021-03-22T12:10:49.814614Z",
      "updatedBy": null,
      "updatedOn": null
    },
    "parameters": {
      "effect": {
        "type": "String",
        "metadata": {
          "displayName": "Effect",
          "description": "Enable or disable the execution of the policy"
        },
        "allowedValues": [
          "Audit",
          "Deny",
          "Disabled"
        ],
        "defaultValue": "Audit"
      }
    },
    "policyRule": {
      "if": {
        "allOf": [
          {
            "field": "type",
            "equals": "Microsoft.DBforPostgreSQL/servers"
          },
          {
            "field": "Microsoft.DBforPostgreSQL/servers/replicationRole",
            "equals": "None"
          },
          {
            "field": "[concat('tags[', 'noGeo', ']')]",
            "notEquals": "true"
          }
        ]
      },
      "then": {
        "effect": "[parameters('effect')]"
      }
    }
  },
  "id": "/subscriptions//providers/Microsoft.Authorization/policyDefinitions/e2a95e10-761d-4cd2-8e61-eefb5681d7d7",
  "type": "Microsoft.Authorization/policyDefinitions",
  "name": "e2a95e10-761d-4cd2-8e61-eefb5681d7d7"
}