The lock screen wallpaper can be set individually if desired. After selecting the desired image or photo, the Huawei smartphone will ask us whether to set the background for the home screen, the lock screen, or both.

Android 10 | EMUI 10.0
Step 1:  Open the  Settings
Step 2:  Tap on  Home screen & wallpaper
Step 3:  Tap on  W  allpaper
Step 4:  Choose a  wallpaper
Step 5:  Tap on  Save
Step 6:  Choose  Lock screen
  1. Open the Settings
  2. Tap on Home screen & wallpaper
  3. Tap on Wallpaper
  4. Choose a wallpaper
  5. Tap on Save
  6. Choose Lock screen

Huawei Instructions