No data for target Pod

Grafana Prometheus
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1

These is my app manifest:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: mongodb-deployment
  labels:
    app: mongodb
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mongodb
  template:
    metadata:
      labels:
        app: mongodb
    spec:
      containers:
      - name: mongodb
        image: mongo:latest
        ports:
        - containerPort: 27017
---
apiVersion: v1
kind: Service
metadata:
  name: mongodb-service
spec:
  selector:
    app: mongodb
  ports:
    - protocol: TCP
      port: 27017
      targetPort: 27017

My app’s exporter’s updated values (mongodb-exporter.yaml):

  uri: "mongodb://mongodb-service:27017"

serviceMonitor:
  enabled: true
  additionalLabels:
    release: prometheus

I apply the helm chart using:
helm install mongodb-exporter prometheus-community/prometheus-mongodb-exporter -f mongodb-exporter.yaml

I can now see the service monitor for mongo db in the Prometheus UI but when I try to visualize metrics on Grafana, I get No data

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