With so many notifications from various applications, missing the important ones is easy. Please consider adding “Persistent Reminders” similar to https://www.dueapp.com
We don’t support any reminders directly in Agenda, we integrate instead with the system Reminders of Apple, which are available to all apps.
The Reminder app does support persistent reminders, and you can see these in Agenda too.
I’m not sure if Due App also uses the standard shared reminder store, but if it does, anything you add there should go into Agenda too.
It is better to use a dedicated reminder app like Reminders or Due to organize your reminders. Agenda just makes it easier to integrate them in your notes.