The launcher is the startup application on the Huawei smartphone and is responsible for the home screen, the widgets and app shortcuts used on it.
The different launchers also differ in functionality and design. Some focus on a customizable home screen, others on a variety of features or tools.
More launcher can be downloaded from the Google Play Store. The most popular launcher apps include the Nova Launcher, Microsoft, and Evie Launcher.

Android 10 | EMUI 10.0
Step 1:  Open the  Settings
Step 2:  Tap on  Apps
Step 3:  Tap on  Default apps
Step 4:  Tap on  Home app
Step 5:  Choose the  default home / launcher app
  1. Open the Settings
  2. Tap on Apps
  3. Tap on Default apps
  4. Tap on Home app
  5. Choose the default home / launcher app

Huawei Instructions