Unlike standard OTA (Over-The-Air) updates, which are seamless and automatic, flashing firmware via Fastboot requires a hands-on approach. One of the most common hurdles users face is dealing with the file format, which differs from the standard .zip or .xml files used in older Xiaomi flashing processes.
Flashing firmware is a sensitive process. A failure halfway through can leave your device unusable (hard brick). Ensure you have the following items ready: How To Flash Xiaomi Tgz Images Firmware Using MiFlash Tool