OPPO has started pushing new ColorOS update for OPPO Reno2 F, Reno2 Z, and Find X smartphones, the new update comes with the Android January 2021 security patch.
The latest update comes on ColorOS 7.1 based on Android 10 for all these devices and the company recently opened early access ColorOS 11 beta program for OPPO Reno2 F users, if you owned the device so you can register for the Android 11 beta update.
However, OPPO is providing the security patch for January 2021. The update brings no major changes apart from the security fix and minor update to improve the performance. The new update comes on build number CPH1989EX_11_C.18 for Reno2 F CPH1945EX_11_C.45 for Reno2 Z and CPH1871EX_11_F.29 for Find X users.
First of all, try triggering the installation manually by opening your device Settings, tapping Software update, and selecting the Download and install option on the next screen.