The Mi 10T and Mi 10T Pro have started receiving MIUI 12.5 globally. V12.5.1.0.RJDMIXM is rolling out now as an OTA and brings MIUI's global branch in line with many others, including Europe and India.
https://www.notebookcheck.net/Xiaomi-rolls-out-MIUI-12-5-to-the-Mi-10T-and-Mi-10T-Pro-globally.551123.0.html