We have installed envoy-gateway 1.4 which runs of course envoy. Since datadog has the envoy integeration we would expect these metrics to be ingested as part of the envoy integration.
Instead they are being ingested as custom metrics.

Agent Environment
gcr.io/datadoghq/agent:7.65.1

Describe what happened:
I tried forcing the deployment to use the envoy checks by adding this annotation but it didnt seem to work

            ad.datadoghq.com/envoy.checks: |
              {
                "envoy": {
                  "init_config": {},
                  "instances": [
                    {
                      "openmetrics_endpoint": "http://%%host%%:19001/stats/prometheus",
                      "namespace": "envoygateway"
                    }
                  ]
                }
              }

Instead the metrics show up like this in metrics explorer

Describe what you expected:
Envoy gateway metrics ingested as envoy integration metrics

Additional environment details (Operating System, Cloud provider, etc):
Kubernetes GKE