The first update after the long-awaited arrival of the Android 12-based MIUI 13 interface for Xiaomi Mi 10T Pro (and non-Pro) handsets can be easily considered a minor patch, although it looks like the power drain issues that were affecting quite a few users are now gone. Sadly, this is not a fix mentioned in the official description, so you will have to take my word for it (as usual, sharing your personal experience with the update as well is welcome and highly encouraged).
Since I applied the update less than a day ago and I haven't used the phone much since then, I cannot give you any accurate figures regarding the improvements in battery life that come with MIUI 13.0.6. However, to me is clear that battery drain has been reduced. As a side note, I was barely able to get between 4 and 4.5 hours of SoT since the Android 12-based update, no matter if I played some game, listened to music/watched videos on YouTube, or just surfed the internet.
The piece of code that has recently reached my Mi 10T Pro comes with a laconic description, as you can see below, and it appears to be just a minor security update as well. Am I the only one who noticed a sharp drop in battery life (about one hour SoT lost!) after updating to MIUI 13? Hit the comments section and tell us about the battery life of your Xiaomi Mi 10T Pro after it got Android 12/MIUI 13.