Last year, Xiaomi promised three major OS updates for the Xiaomi 11T Pro, 11T, and Xiaomi 11 Lite 5G NE. It's unclear if the company is trying to renege on that but its website currently lists the three phones as eligible for just two OS updates.
https://www.notebookcheck.net/The-Xiaomi-11T-Pro-11T-and-11-Lite-5G-NE-are-listed-for-just-two-major-OS-updates-on-Xiaomi-s-website.597445.0.html