Your Huawei smartphone has a fingerprint sensor that you can set up to unlock the device, authorize purchases, or sign in to us. It doesn't matter what fingerprint you add. If an unlocking method has previously been defined by entering a pattern, PIN or password, you need the respective unlocking method before setting up.

Note: To activate fingerprint ID usage, a PIN / password request is saved beforehand

Android 10 | EMUI 10.0
Step 1:  Open the  settings
Step 2:  Tap on  Biometric & password
Step 3:  Tap on  Fingerprint ID
Step 4:  Tap on  Fingerprint management
Step 5:  Type in your  PIN
Step 6:  Activate  Unlock device
Step 7:  Follow the  instructions  on the  display
  1. Open the settings
  2. Tap on Biometric & password
  3. Tap on Fingerprint ID
  4. Tap on Fingerprint management
  5. Type in your PIN
  6. Activate Unlock device
  7. Follow the instructions on the display

Huawei Instructions