Notification is not coming for ToDo

I have created ToDo in Frappe Framework which is Frappe’s default doctype.
I have assigned that ToDo to user & added today’s date in due date but somehow when I logged in with that user then notification is not coming in notification icon.

Not sure if ToDo has built-in notifications, but you can always create your own system notifications using the Notification doctype.


Setup notifications through “notification” by selecting the doc type as “To-DO”

I have created system notification but still notification is not receiving to logged in user.