Depending on which Huawei device you are using, you can change the resolution of your camera. The image format (4:3/16:9/18,6:9) will be changed too.

Note: The options are depending on the model in use and can vary.

Android 10 | EMUI 10.0
Step 1:  Open  Camera
Step 2:  Open the  settings
Step 3:  Tap on  Resolution
Step 4:  Choose a  resolution
  1. Open Camera
  2. Open the settings
  3. Tap on Resolution
  4. Choose a resolution

Huawei Instructions