How can I retrieve total variants for multiple collections?

Technical Q&A
1

I am trying to retrieve totalVariants of each collection.

mutation {
  bulkOperationRunQuery(
   query: """
     query nodes {
      nodes(ids: ["gid://shopify/Collection/123456", "gid://shopify/Collection/654321"]) {
        ...on Collection {
          id
          products(first: 250) {
            edges {
              node {
                totalVariants
              }
            }
          }
        }
      }
    }
    """
  ) {
    bulkOperation {
      id
      status
    }
    userErrors {
      field
      message
    }
  }
}

A normal query(not bulkOperationRunQuery) would have returned something similar:

{
  "data": {
    "nodes": [
      {
        "id": "gid://shopify/Collection/123456",
        "products": {
          "edges": [
            {
              "node": {
                "totalVariants": 6
              }
            },
            {
              "node": {
                "totalVariants": 6
              }
            }
          ]
        }
      },
      {
        "id": "gid://shopify/Collection/654321",
        "products": {
          "edges": [
            {
              "node": {
                "totalVariants": 5
              }
            }
          ]
        }
      }
    ]
  },
  "extensions": {
    "cost": {
      "requestedQueryCost": 253,
      "actualQueryCost": 8,
      "throttleStatus": {
        "maximumAvailable": 1000,
        "currentlyAvailable": 992,
        "restoreRate": 50
      }
    }
  }
}

But since the number of products could exceed 250, I would probably need bulkOperationRunQuery. I just read that node and nodes arent’ allowed in bulkOperationRunQuery. I also understand collections can have unlimited products thus making the totalVariants per collection unlimited.

Is there a better way to get the totalVariants for a number of collections?