Accessing Postgresql data of Kubernetes cluster

I have kubernetes cluster with two replicas of a PostgreSQL database in it, and I wanted to see the values stored in the database.

When I exec myself into one of the two postgres pod (kubectl exec --stdin --tty [postgres_pod] -- /bin/bash) and check the database from within, I have only a partial part of the DB. The rest of the DB data is on the other Postgres pod, and I don't see any directory created by the persistent volumes with all the database stored.

So in short I create 4 tables; in one postgres pod I have 4 tables but 2 are empty, in the other postgres pod there are 3 tables and the tables that were empty in the first pod, here are filled with data.

Why the pods don't have the same data in it?

How can I access and download the entire database?

PS. I deploy the cluster using HELM in minikube.

Here are the YAML files:

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: postgres-config
  labels:
    app: postgres
data:
  POSTGRES_DB: database-pg
  POSTGRES_USER: postgres
  POSTGRES_PASSWORD: postgres
  PGDATA: /data/pgdata
---
kind: PersistentVolume
apiVersion: v1
metadata:
  name: postgres-pv-volume
  labels:
    type: local
    app: postgres
spec:
  storageClassName: manual
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteMany
  hostPath:
    path: "/mnt/data"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: postgres-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 1Gi
---
apiVersion: v1
kind: Service
metadata:
  name: postgres
  labels:
    app: postgres
spec:
  ports:
    - name: postgres
      port: 5432
      nodePort: 30432
  type: NodePort
  selector:
    app: postgres
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgres
spec:
  serviceName: postgres-service
  selector:
    matchLabels:
      app: postgres
  replicas: 2
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
        - name: postgres
          image: postgres:13.2
          volumeMounts:
            - name: postgres-disk
              mountPath: /data
          # Config from ConfigMap
          envFrom:
            - configMapRef:
                name: postgres-config
  volumeClaimTemplates:
    - metadata:
        name: postgres-disk
      spec:
        accessModes: ["ReadWriteOnce"]
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgres
  labels:
    app: postgres
spec:
  selector:
    matchLabels:
      app: postgres
  replicas: 2
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
        - name: postgres
          image: postgres:13.2
          imagePullPolicy: IfNotPresent
          envFrom:
            - configMapRef:
                name: postgres-config
          volumeMounts:
            - mountPath: /var/lib/postgresql/data
              name: postgredb
      volumes:
        - name: postgredb
          persistentVolumeClaim:
            claimName: postgres-pv-claim
---