Not getting notification in One plus mobile phone

If you are unable to get notification in one plus mobile phone then follow the below steps :

Step 1: Open the mobile settings

Step 2: Go to the "Battery" section

Step 3: Tap "Battery optimization,"

Step 4: Click on 3 dot on the upper right tab "Advanced optimization"

Step 5: You will see to options "Deep optimization" and "Sleep standby optimization"

Step 6: Disable "Sleep standby optimization"

Step 7: After all these changes you will be able to get daily outstanding and summary notification.