A: The Poco X3 Pro (vayu) does not have an Anti-Rollback index in the same way as older Redmi Note devices. You can downgrade from MIUI 14 to MIUI 12.5 via fastboot, but not via recovery.
Think of the bootloader as a security guard standing at the gate of your phone's operating system. When you press the power button, the bootloader instructs the phone on which kernel to boot and verifies that the software being loaded is official and unaltered. xiaomi poco x3 pro unlock bootloader