Make an alert for expiration date

Frappe Framework Customization
1

hello, i made a custom doctype for items that have a date creation and date of expiration, i need to show a red point for expired date items as a notification. how to do that please ?

2

This could help you : Notification

Also, rather than making a custom doctype for storing just two dates and an item link, you could have added custom fields for Creation date and Expiry date.