By default all contacts will be shown on your Huawei device. These will be put together automatically and synchronisized to one list. You can choose to show only contacts from the SIM card, Google account or even messengers like WhatsApp.

Android 10 | EMUI 10.0
Step 1:  Open  Contacts
Step 2:  Open the  menu
Step 3:  Open the  settings
Step 4:  Tap on  Display preferences
Step 5:  Choose between  All contacts ,  Phone ,  SIM ,  Google  or  Customize
  1. Open Contacts
  2. Open the menu
  3. Open the settings
  4. Tap on Display preferences
  5. Choose between All contacts, Phone, SIM, Google or Customize

Huawei Instructions