Please understand that the content displayed on the watch is the same as what you can see from the notification bar of the mobile phone. Can you see the App notifications from the notification bar on your phone? Please note that alerts will only appear on the watch if they pop up on the phone.
And a pre-populated list of existing applications on your mobile device will not appear in Zepp app. Only applications that generate notifications will appear in the list and will populate over time as notifications arrive.
Please check the following steps to troubleshoot your issue:
A. Enable the app alerts in the app.
1) Open Zepp app and tap on"Profile" in the lower right-hand corner.
2) Tap on My devices-- Amazfit GTS 2 mini
3) Tap on Notifications and Reminders --- App alerts to allow Zepp app access notifications
4) Turn on App Alerts
5) Tap on "Manage apps" in the lower middle of the screen and select the app to alert.
Note: If you toggle on "only receive app alerts when the screen is off", you will only receive app alerts when your phone screen is off.
B. Make sure Bluetooth is turned on in your mobile phone.
C. Check if you enable DND mode (Silent mode) on the watch. Please disable it if it's enabled.
D. Make sure your phone's notification bar is functioning.
F. Go to your phone settings, find app notifications, toggle off and on, reboot your phone, restart Zepp app and try again.
G. Go to Zepp app-Profile-My devices -Amazfit GTS 2 mini, tap Run in background to check the settings and make sure that Zepp app runs in background.
If you are using an iPhone, please go to iPhone Settings > Notifications > Zepp app >Toggle on all the alerts. And please make sure you have enabled "others" in Zepp app.