Thank you for reaching out and we apologize for the inconvenience you're experiencing.
Check if you allow displaying the most frequently used apps in the drawer. Besides, go to [Settings] >> [About phone] >> update your phone to the latest OTA version. If the app icon doesn't appear for certain apps, ensure those apps are properly installed. A simple restart can help fix temporary system glitches.
To allow displaying the most frequently used apps in the drawer, please refer to the following steps:
1. Go to the [Settings] APP on your phone;
2. Select [Home screen];
3. Choose [With App drawer];
4. Turn on [App suggestions].