The Stable update V11.0.3.0.PFJRUXM has been officially released for Redmi K20 / Mi 9T (codename is davinci). 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.
The firmware files posted here are all official Xiaomi MIUI or HyperOS ROM, xiaomiROM.com do not own and never modified those firmwares，you will always download the file from Xiaomi server.
You may interest in those contents: Redmi K20 / Mi 9T ROM Topics Xiaomi Devices Index
Download Mi 9t (davinci) Russia (RU) MIUI 11 V11.0.3.0.PFJRUXM Recovery ROM with Android 9.0. Firmware size is 2.6 GB.