How to configure system notification and email notification

I want to set notification before the date and time for follow up but did not get any notification can any one help on that this is urgent requirement

The “Days Before” notification doesn’t go at a specific time. It goes when the “daily” scheduler events run. This is slightly after midnight as per the timezone set in System Settings.

Please note that this will only run if the scheduler is enabled. You can check whether scheduler is enabled or not by executing the following command:

bench doctor

Is this new-notification screen ??