Per bucket monitor based on top_hits

Plugins Alerting
1

Versions:
OpenSearch: 2.11.0

Describe the issue:
I’m fairly new to opensearch alerting and would like to setup a per bucket monitor for the following query:

{
  "size": 0,
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "event.keyword": "request_calculated"
          }
        },
        {
          "range": {
            "@timestamp": {
              "gte": "now-2h"
            }
          }
        }
      ]
    }
  },
  "aggs": {
        "by_asset": {
          "terms": {
            "field": "asset"
          },
          "aggs": {
            "earliest_doc": {
              "top_hits": {
                "size": 1,
                "sort": [
                  {
                    "@timestamp": "asc"
                  }
                ],
                "_source": {
                  "includes": [
                    "request_power_active",
                    "allocated_power_active",
                    "@timestamp"
                  ]
                }
              }
            },
            "latest_doc": {
              "top_hits": {
                "sort": [
                  {
                    "@timestamp": "desc"
                  }
                ],
                "_source": {
                  "includes": [
                    "request_power_active",
                    "allocated_power_active",
                    "@timestamp"
                  ]
                },
                "size": 1
              }
            }
          }
        }
      }
    }

Is this even possible with a top_hits aggregation? I cannot get it to work.