How do I know if notifications are working?

[MPE2016]

Hi there,

Really enjoying plant-it so far, but kind of stuck with notifications.

This is my config (with regards to notifications):

REMINDER_NOTIFY_CHECK=*/15 * * * * *
MAX_REQUESTS_PER_MINUTE=100

NTFY_ENABLED=true

I've enabled the ntfy notifications in the settings and set a bunch of reminders, but nothing seems to come through.

Is there something I forgot to do?