Adding a Set Variable to mutiple objects

I am trying to add a set variable to a group of objects being output from an Item List. Currently, only the first object is getting the Set Variable, but I want them all to get it. Any idea how to accomplish this?

That should normally work fine by default. I guess the problem is the expression you have set.

Can you please past the value of the expression you are using.

Thanks for checking Jan, here is the whole workflow:

{
  "nodes": [
    {
      "parameters": {},
      "name": "Start",
      "type": "n8n-nodes-base.start",
      "typeVersion": 1,
      "position": [
        -540,
        -280
      ]
    },
    {
      "parameters": {
        "triggerTimes": {
          "item": [
            {
              "mode": "everyHour"
            }
          ]
        }
      },
      "name": "Cron",
      "type": "n8n-nodes-base.cron",
      "typeVersion": 1,
      "position": [
        -540,
        -420
      ]
    },
    {
      "parameters": {
        "authentication": "headerAuth",
        "url": "=https://amazon-product-reviews-keywords.p.rapidapi.com/product/reviews",
        "responseFormat": "string",
        "options": {},
        "headerParametersUi": {
          "parameter": [
            {
              "name": "x-rapidapi-host",
              "value": "amazon-product-reviews-keywords.p.rapidapi.com"
            }
          ]
        },
        "queryParametersUi": {
          "parameter": [
            {
              "name": "asin",
              "value": "={{$node[\"Global Variables\"].json[\"asin\"]}}"
            },
            {
              "name": "page",
              "value": "={{$node[\"Increment\"].data[\"counter\"]}}"
            }
          ]
        }
      },
      "name": "Get HTML",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 1,
      "position": [
        170,
        -180
      ],
      "credentials": {
        "httpHeaderAuth": {
          "id": "36",
          "name": "Rapid API Amazon Key"
        }
      }
    },
    {
      "parameters": {
        "keepOnlySet": true,
        "values": {
          "string": [
            {
              "name": "asin",
              "value": "B071CG56DP"
            }
          ],
          "number": [
            {
              "name": "Customer ID",
              "value": 2
            },
            {
              "name": "counter",
              "value": 1
            }
          ]
        },
        "options": {}
      },
      "name": "Global Variables",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [
        -340,
        -360
      ]
    },
    {
      "parameters": {
        "fieldToSplitOut": "data.reviews",
        "options": {}
      },
      "name": "Item Lists",
      "type": "n8n-nodes-base.itemLists",
      "typeVersion": 1,
      "position": [
        320,
        -180
      ],
      "alwaysOutputData": true
    },
    {
      "parameters": {
        "conditions": {
          "number": [
            {
              "value1": "={{$node[\"Get HTML\"].json[\"data\"][\"reviews\"].length}}",
              "value2": 10
            }
          ],
          "string": [
            {
              "value1": "={{$node[\"Get HTML\"].json[\"data\"][\"reviews\"][0][\"id\"]}}",
              "operation": "isEmpty"
            }
          ]
        },
        "combineOperation": "any"
      },
      "name": "Check for Pagination",
      "type": "n8n-nodes-base.if",
      "typeVersion": 1,
      "position": [
        790,
        -180
      ]
    },
    {
      "parameters": {},
      "name": "NoOp",
      "type": "n8n-nodes-base.noOp",
      "typeVersion": 1,
      "position": [
        1000,
        -280
      ]
    },
    {
      "parameters": {},
      "name": "Start Loop",
      "type": "n8n-nodes-base.noOp",
      "typeVersion": 1,
      "position": [
        -150,
        -180
      ]
    },
    {
      "parameters": {
        "keepOnlySet": true,
        "values": {
          "number": [
            {
              "name": "counter",
              "value": "={{$node[\"Start Loop\"].json[\"counter\"]+1}}"
            }
          ]
        },
        "options": {}
      },
      "name": "Increment",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [
        980,
        30
      ]
    },
    {
      "parameters": {
        "workflowId": "39"
      },
      "name": "Process Reviews",
      "type": "n8n-nodes-base.executeWorkflow",
      "typeVersion": 1,
      "position": [
        630,
        -180
      ],
      "alwaysOutputData": true
    },
    {
      "parameters": {
        "amount": 5,
        "unit": "seconds"
      },
      "name": "Wait",
      "type": "n8n-nodes-base.wait",
      "typeVersion": 1,
      "position": [
        10,
        -180
      ],
      "webhookId": "12488283-2a75-44f4-807a-935decb1c8bb"
    },
    {
      "parameters": {
        "values": {
          "string": [],
          "number": [
            {
              "name": "Customer ID",
              "value": "={{$node[\"Global Variables\"].json[\"Customer ID\"]}}"
            }
          ]
        },
        "options": {}
      },
      "name": "Set Customer ID",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [
        470,
        -180
      ]
    }
  ],
  "connections": {
    "Start": {
      "main": [
        [
          {
            "node": "Global Variables",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Cron": {
      "main": [
        [
          {
            "node": "Global Variables",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get HTML": {
      "main": [
        [
          {
            "node": "Item Lists",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Global Variables": {
      "main": [
        [
          {
            "node": "Start Loop",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Item Lists": {
      "main": [
        [
          {
            "node": "Set Customer ID",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check for Pagination": {
      "main": [
        [
          {
            "node": "NoOp",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Increment",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Start Loop": {
      "main": [
        [
          {
            "node": "Wait",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Increment": {
      "main": [
        [
          {
            "node": "Start Loop",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Process Reviews": {
      "main": [
        [
          {
            "node": "Check for Pagination",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Wait": {
      "main": [
        [
          {
            "node": "Get HTML",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Set Customer ID": {
      "main": [
        [
          {
            "node": "Process Reviews",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

I figured it out, I put the Set variable before the Item list node, then I included it with the item list by calling it specifically.