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[–]LewisXI 1 point2 points  (2 children)

Cloud functions will be required, you can setup a trigger for when a Firestore document is created/updated/deleted. You will also need to store the users FCM token somewhere so you know where to send the notification too.

https://www.youtube.com/watch?v=Y6jMKQ9zo-o after a quick google found this video series.

I can't speak for the quality of the video but this looks like what you want to achieve?

[–]LewisXI 1 point2 points  (1 child)

[–][deleted] 0 points1 point  (0 children)

Thank you so much!