OnePlus 9 Pro Stock ROM Firmware is now available for download and You can download it below. by using this firmware you can solve all software Issues within your OnePlus 9 Pro such as hang-on Logo, FRP lock, fastboot Mode, display blank or white after flash, dead recovery, dead after flash, etc.
On this page, you will find the direct link to get the official OnePlus 9 Pro Stock ROM Firmware (flash file) on your computer. The Firmware comes as a zip package and contains the original Firmware, Flash Tool, Driver, and How-to Flash Manual.
make a backup before the Process
it will erase all your data Including Internal Storage