Submit-only portal users to receive notifications for status changes

Currently submit-only portal allows only notifications to comments. We are unable to notify users or subscribers on status changes automatically. We need to manually enter comments regarding the status to inform them. It would be helpful to have 'notifications' sent for status changes similar to private portals. Assuming as this is fucntioanlity is already existing, just need to enable for submit-only portals or provide an option to enable it by the admin.