As with any software update, it's essential to exercise caution when installing the Nougat update on your Oppo F3. Make sure to:

Always check your Build Number in Settings > About Phone before proceeding.

Your device is a paperweight. XDA cannot help with proprietary clone firmware.

on how to manually flash the official Nougat firmware for the Oppo F3? Oppo F3 - CPH1609 - Request a Device - /e/OS community

A separate thread has also been opened for porting , but it currently bootloops.