Automatic Push notifications on mobile not working

Hi, I’ve recently created a doc with a “Button” column which is supposed to send automatic push notifications to my phone, but the notifications only work once I manually push the button. Any ideas why this might be?
The button is supposed to work once “Days till charged” column drops to 2. On the picture, it says 3 days, but I have tried with 2 and 1 days and there was no automatic push notification. Thanks for any advice.