Why is Postgres data deleted when pod restarted on Kubernetes?

Expected: test table should be retained in the PV storage after

postgres pod restart

Actual: data is not stored when recreating pod and there are no errors. Everything seems to be working fine, but it does not behave as expected when I create table -> delete pod -> enter the new pod and check tables list.

Steps to reproduce:

1. kubectl apply -f postgres-secrets.yaml
2. kubectl create ns postgres
3. kubectl -n postgres apply -f postgres-pv-claim.yaml
4. kubectl -n postgres apply -f postgres.yaml
5. Enter pod: kubectl exec -it postgres-0 bash
6. Use psql: psql --username=xyzapi init-db
7. Create Table :
   CREATE TABLE COMPANY(
   ID INT PRIMARY KEY NOT NULL,
   NAME TEXT NOT NULL,
   AGE INT NOT NULL,
   ADDRESS CHAR(50),
   INCOME REAL
   );

7.1 Ensure table is there: \dt

1. Exit pod
2. Delete pod: kubectl -n postgres delete pod postgres-0
3. When pod is recreated, enter it again: kubectl exec -it postgres-0 bash
4. Use psql again: psql --username=xyzapi init-db
5. Check tables: /dt
6. Issue - no table there, expected it to be there.