You can display all available accents of a letter on the Huawei smartphone by tapping and holding the letter. If you want to display all available accents, you can set this in the keyboard settings.

Android 10 | EMUI 10.0
Step 1:  Open the  settings
Step 2:  Tap on  System & updates
Step 3:  Tap on  Language & input
Step 4:  Tap on  SwiftKey Keyboard
Step 5:  Tap on  Typing
Step 6:  Tap on  Keys
Step 7:  Activate or deactivate  Accented characters
  1. Open the settings
  2. Tap on System & updates
  3. Tap on Language & input
  4. Tap on SwiftKey Keyboard
  5. Tap on Typing
  6. Tap on Keys
  7. Activate or deactivate Accented characters

Huawei Instructions