The design of the rear case of the upcoming Xiaomi Mi 11T has been revealed in an FCC listing. The certification database also mentions that the Mi 11T will operate on MIUI 12.5 out of the box and that it has an "overall diagonal dimension" of 174 mm. The Mi 11T is expected to sport a MediaTek Dimensity chip.
https://www.notebookcheck.net/Xiaomi-Mi-11T-rear-case-design-revealed-in-FCC-listing.556325.0.html