There are two primary methods discussed on XDA for rooting the F11:
https://forum.xda-developers.com/c/oppo-f11.9145/
October 2023 Device: Oppo F11 (CPH1911, CPH1913, CPH1969) Android Version: ColorOS 6 (Android 9 Pie) to ColorOS 11 (Android 11)
Additionally, the user might not be tech-savvy, so I should explain the terms in simple language. Emphasize the importance of following guides carefully to avoid bricking the device. Also, highlight that rooting voids the warranty and has potential security risks. Maybe suggest they consider alternatives if they're not confident with the process.
runs on ColorOS 6 (Android 9). Official software support has largely ended, making community-led rooting one of the few ways to keep the device updated through custom ROMs.