I deployed Grafana with Prometheus.
I aim to monitor all api call requests of apps in seperated namespace.
But I cannot found http_request_duration_seconds_count in Metrics browser by default.

I dont know the root cause and could you please help teach how to configure ‘http_request_duration_seconds_count’ / ‘http_request_duration_seconds_sum’ / ‘http_request_duration_seconds_bucket’ on Prometheus?