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
Copy contacts -  Open  Contacts
Copy contacts -  Open the  menu
Copy contacts -  Open the  settings
Copy contacts -  Tap on  Organize contacts
Copy contacts -  Tap on  Copy contacts
Copy contacts -  Choose between  Phone ,  SIM  or  Google
Copy contacts -  Choose one or more  contacts
Copy contacts -  Tap on  Copy
Copy contacts -  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