CQL searching for ContentProperties

Confluence 6.0.3

I have added the following content property to a page, including “propertyKey” and “extractions”. CQL still does not seem to find them.

Is this available only on cloud, or am I missing something else?

property json looks like this:

{
      "id": "14516641",
      "key": "rbitemtraining",
      "value": {
        "trainingRecords": [
          ........
        ],
        "propertyKey": "radbee_training_records",
        "extractions": [
          {
            "objectName": "trainingRecords",
            "type": "string",
            "alias": "rbtrainingRecords"
          }
        ]
      },
      "version": {
        ......
      },
      "_links": {
      .....
      },
      "_expandable": {
      .....
      }
    },