Android has a number of features which can interfere with an app’s ability to present notifications (or reminders, as they are called in Wellburrito).
Please disable and re-enable any reminders you have in Wellburrito, from Settings ➔ Reminders.
Open the app info for Wellburrito by long pressing the icon then choosing ‘App info’, or finding it under the settings app of your phone.
Ensure that notifications are on, and that battery optimisations are disabled.
Xiaomi / Miui
On Xiaomi phones, or phones with the Miui operating system, as well as setting the same battery optimisation settings as required in Android, it is also necessary to enable Autostart.