You can monitor and change the network access of individual apps on the Huawei smartphone, if desired. You can independently set whether an app is given access to the mobile data. You can also determine whether the background data should be activated. The app uses the network in the background. You can also activate and deactivate the roaming data if you are abroad.

Note: If the background data for messenger apps, such as WhatsApp, is deactivated, messages may no longer be loaded or may be delayed.

Android 10 | EMUI 10.0
Step 1:  Open the  settings
Step 2:  Tap on  Apps
Step 3:  Tap on  Apps
Step 4:  Choose an  app
Step 5:  Tap on  Data usage
Step 6:  Activate or deactivate  Mobile data ,  Wi-Fi ,  Background data  or  Roaming data
  1. Open the settings
  2. Tap on Apps
  3. Tap on Apps
  4. Choose an app
  5. Tap on Data usage
  6. Activate or deactivate Mobile data, Wi-Fi, Background data or Roaming data

Huawei Instructions