The Stable update V126.96.36.199.QFKEUXM has been officially released for Redmi K20 Pro / Mi 9T Pro (codename is raphael). Before updating, please make sure you have downloaded the exact ROM matching your Xiaomi phone/tablet. In Fastboot mode, you can check model code by typing
fastboot getvar product in cmd/shell.
Download Mi 9t pro (raphael) Europe (EEA) MIUI 11 V188.8.131.52.QFKEUXM Recovery ROM with Android 10.0. Firmware size is 2.7 GB.