Solution:
A. Enable the app alerts in the app.
Open Zepp Life App and tap on “Profile” in the lower right-hand corner.
Tap on My devices-- Amazfit Bip
Tap on App alerts to allow Zepp Life access notifications
Turn on App Alerts
Tap on “Manage apps” in the lower middle of the screen and select app to alert.
B. Make sure Bluetooth is turned on on your mobile phone.
C. Check if you enable DND mode (Silent mode) on the watch. Please disable if enabled.
D. Make sure your phone notification bar is functioning.
E. For Android mobile device, please enable auto-start and lock Zepp Life App in the "recent Apps"/ "App overview" plane.
F. Go to your phone settings, find app notifications, toggle off and on, reboot your phone, restart Zepp Life App and try again.
Does it help?