In order to be able to use the emergency SOS function and the emergency SMS to the full extent, at least one emergency contact must be stored. In addition to the emergency number 112, which is set by default, any number of other contacts can be added.

Android 10 | ColorOS 7.0
Step 1:  Open the  Settings
Step 2:  Tap on  Privacy
Step 3:  Tap on  Emergency SOS
Step 4:  Tap on  Emergency Numbers
Step 5:  Tap on  Add Emergency Contact
Step 6:  Select desired  Contacts
Step 7:  Tap on  Add
  1. Open the Settings
  2. Tap on Privacy
  3. Tap on Emergency SOS
  4. Tap on Emergency Numbers
  5. Tap on Add Emergency Contact
  6. Select desired Contacts
  7. Tap on Add

Oppo Instructions