Cannot query cartTransforms from custom app

[katy4]

I'm only able to query cartTransforms from the shopify graphiql app, and not my custom app. My app has read and write cart transforms permissions. I can set metafields on the cartTransform via the metafieldsSet mutation, but cannot query for the current values. No errors are returned, just a blank array.

query cartTransforms ($first: Int!){
  cartTransforms(first: $first) {
    edges {
      node {
        id
        metafields (first: 10) {
          edges {
            node {
              key
              namespace
              id
              value
            }
          }
        }
      }
    }
  }
}

This same query correctly returns cartTransforms from the graphiql app. This is what is returned from my custom app:

{
  "data": {
    "cartTransforms": {
      "edges": []
    }
  }
}

[oscprofessional]

Cart Transform API is not available for Custom Apps. It works with Shopify Plus Plan. Also, are you testing on Development store or Live Store?

[katy4]

I have the Shopify plus plan. I'm using the Admin API to query this. It does not work on either the live or development stores - both return the same empty array