Although it is already June and the May security patch has been around for a while, the MIUI 13.0.6 Global Stable software update for the Xiaomi Mi 10T Pro only includes the April security patch. As its description shows, this 262 MB software package does not bring any other noticeable changes.
https://www.notebookcheck.net/MIUI-13-0-6-Global-Stable-brings-the-April-2022-security-patch-to-Xiaomi-Mi-10T-Pro-users.624974.0.html
I thought a bit about it, and I decided it is better to add this in a comment down here - the Mi 11X apparently got about the same update (well, more or less), so even Mi 10 T/Pro users might find this video interesting -
https://www.youtube.com/watch?v=6_mJmsbCtvE
Isn't it common for phone manufacturers to deliver the "planned obsolescence?" They deliberately make you uncomfortable with your current phone without you realizing it so they can indirectly force you to buy a new phone, for their business' sake.
That's how I see the battery drain issue, and that's why I am never convinced to update my phone.