Health Metrics in Cluster Level

What should be my approach to Proceed?

Can you give more info on what you are looking for? You can run health checks for your frontend, and history pods, for example:

grpc-health-probe -addr=<address:port> -service=temporal.api.workflowservice.v1.WorkflowService
grpc-health-probe -addr=<address:port> -service=temporal.api.workflowservice.v1.MatchingService
grpc-health-probe -addr=<address:port> -service=temporal.api.workflowservice.v1.HistoryService