Most likely the final step before the arrival of the MIUI 13 firmware, the MIUI 12.5.10 update hits the Xiaomi Mi 10T Pro handsets. While this update has only 160 MB and includes the November 2021 security patch alongside the usual tweaks and fixes, there are no new features involved.
https://www.notebookcheck.net/MIUI-12-5-10-Enhanced-Edition-brings-last-month-s-security-patch-to-the-Xiaomi-Mi-10T-Pro.585457.0.html