Just got myself a Mi TV Stick, but it's still on the October 2020 patch with build 832. I've seen some posts about this thing getting updates, but it keeps saying I already have the latest version. I live in the Netherlands but have the region set to Germany as there is no option for Netherlands, not sure if that has to do with it
Please understand that the things you read online (although they may be true), come from many different parts of the world. Therefore, everyone won't get an update at the same time. I have owned a Mi Box S for 1 1/4 years . I can confirm to you that I have gotten at least 2 updates within that time. You really don't have to ask the device, it will tell you.
Peace