It appears Redmi Note 8T owners are going to find themselves in the same boat as those with the very similar Redmi Note 8 smartphone in regard to a MIUI 12 update. While it seemed the Android 10-based overlay was winging its way to the Redmi Note 8T (Global, Europe, Russia) this month, Xiaomi has now warned that a delay is possible.
https://www.notebookcheck.net/Redmi-Note-8T-users-find-themselves-in-familiar-territory-as-Xiaomi-warns-of-a-potential-MIUI-12-delay.498485.0.html