The update for Redmi K20 Pro came out with build number V220.127.116.11.RFKCNXM and is based on the Android 11 operating system. The system has so far been released in China. The global version of the Xiaomi Mi 9T Pro should be updated a little later. As for the POCO X3 Pro, it will receive the firmware number V18.104.22.168.RFKCNXM. OTA for it is available so far only in Europe (EEA region).
If we talk about the changelog, then this is the standard MIUI 12.5 set: updated animation, new live wallpapers, more system nature sounds, improved privacy, etc.