Grafana Dashboard for Kubernetes Pod Metrics is not showing any data

I have Prometheus/Grafana setup for Kubernetes monitoring. Using Kubernetes Pod Metrics dashboard for Grafana | Grafana Labs for Pod monitoring. But this Dashboard is not showing any metric for selected pod, just shows alertmanager container without any metric. Is there any better solution ? Other Dashboard Cluster Monitoring for Kubernetes dashboard for Grafana | Grafana Labs works fine.

Here is the screenshot

What I am missing here ? is there better way to monitor Kubernetes Pod ?