The Stable update V14.0.6.0.ULQMIXM has been officially released for Xiaomi 12T (codename is plato). 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: Xiaomi 12T ROM Topics Xiaomi Devices Index
Download Xiaomi 12t (plato) Global MIUI 14 V14.0.6.0.ULQMIXM Recovery ROM with Android 14.0. Firmware size is 5.3 GB.