If you are looking for the official stock firmware for the Oppo RX17 Pro, you can download it here. The firmware is useful for fixing software related problems like. Flashing the firmware is via QFIL or MSM Download Tool.
Un-rooting your phone
Restore to factory defaults
Fix malware/monkey virus etc
Download Oppo RX17 Pro Stock Firmware
Download the stock Android 8 firmware for your Oppo RX17 Pro below.
AU(VF) and NZ – DownloadBD IN KH LK MM MY NP PH PK SA TH VN – DownloadRU KZ ES(MV) AU SG FR IT ES NL UK – Download