Flutter: How can I create repeating push notifications?

Hey there,

how can I create repeating push notifications? I want to be able to schedule those at least a little bit flexible (e. g. every year, every 3 months, every month, … nothing too fancy).

I already tried the package flutter_local_notifications but for me it looks like I just can create repeating notifications for every week or every day.

I am already using firebase so I would be open to any solutions which are based on that.

My goal is the following: The users of my app should be able to create a (repeating) reminder in form of a push notification.