By means of screencast we can transfer the screen content of the Oppo smartphone to other devices such as the Smart TV, where the picture is mirrored/streamed to the other device.

To be able to transmit the screen content, screencast must be activated on the Oppo device and then a connection must be established with Wi-Fi Display.

Android 10 (ColorOS 7.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Other Wireless Connections
Step 3:  Tap on  Screencast
Step 4:  Enable or Disable  Screencast
  1. Open the Settings
  2. Tap on Other Wireless Connections
  3. Tap on Screencast
  4. Enable or Disable Screencast