Xiaomi unveiled MIUI 12 in late April and then got to work on checking devices off its update to-do list. The latest to get the update are Mi 10 5G and Mi 10 Pro 5G units in China. What about the rest of the world?
There are 47 phones scheduled to get MIUI 12, but only the 2019 Mi and Redmi flagships are getting it by the end of this month (e.g. the Mi 9T/Redmi K20 already got it). The timing of the global release for phones in the Mi 10 series is still to be announced, but it’s probably not happening this month.
Mi 10 and 10 Pro owners in China are receiving a fairly small update, just 820 MB, which pushes their phones to MIUI v126.96.36.199. It brings tons of new animations (including Super Wallpapers), improved dark mode, new navigation gestures, privacy controls, the AI Calling feature (call transcription for hearing-impaired users) and more.
Source (in Chinese)