If you don't receive any Low Food Notifications when the food runs out, you can refer to the following steps for troubleshooting:
1. Check if the feeder's screen shows "ADD FOOD".
2. Clean the low-food detection light and check again.
3. Clean the small transparent window on the food tank. For guidance on this process, here is a video for your reference:
4. Check if the APP notification permission is allowed in your phone's settings.
5. Check if the notifications on the APP are turned on.