Sleep a few more minutes? the snooze function tells the alarm clock to ring again after the set time. on the Oppo smartphone, the default snooze time is 5 minutes, which can be changed to up to 30 minutes.

Android 10 (ColorOS 7.0)
Step 1:  Open the  Clock -App
Step 2:  Open the  Menu
Step 3:  Tap on  Settings
Step 4:  Tap on  Interval
Step 5:  Choose desired  Time
  1. Open the Clock-App
  2. Open the Menu
  3. Tap on Settings
  4. Tap on Interval
  5. Choose desired Time

Oppo Instructions