SharePoint workflow overdue email is not working

Hello

I am Abdul Fattah working as a new SharePoint developer. I created workflow for my organization project web app (PWA) through SharePoint designer. But I would like to send overdue task email (after 1 days and 3days) to assigned person in workflow. But it is not working. I am using scheduling template for task schedule.

Can anyone help me on that please? screenshot attached below-