Already existing contacts can be copied internally on the Huawei Smartphone to have them stored on diverse storage places. You can choose source and storage location. Messenger like WhatsApp are also listed.

Android 10 | EMUI 10.0
Step 1:  Open  Contacts
Step 2:  Open the  menu
Step 3:  Open the  settings
Step 4:  Tap on  Organize contacts
Step 5:  Tap on  Copy contacts
Step 6:  Choose between  Phone ,  SIM  or  Google
Step 7:  Choose one or more  contacts
Step 8:  Tap on  Copy
Step 9:  Choose a  storage location
  1. Open Contacts
  2. Open the menu
  3. Open the settings
  4. Tap on Organize contacts
  5. Tap on Copy contacts
  6. Choose between Phone, SIM or Google
  7. Choose one or more contacts
  8. Tap on Copy
  9. Choose a storage location

Huawei Instructions