Xiaomi seeds MIUI 12.5 to the Mi 10 Pro and the Mi 11
It seems that Xiaomi has started rolling out MIUI 12.5 to more Mi 11 handsets. Previously, the company issued its latest OS to select Mi 11 devices as part of Stable Beta testing on its European MIUI branch. According to GSMArena, Xiaomi has released V22.214.171.124.RKBEUXM more widely, which is a 656 MB download as an OTA update.
Additionally, Xiaomi has started distributing V126.96.36.199.RKBMIXM to the Mi 11 for devices on MIUI's global branch. If your device has not received a notification to download MIUI 12.5, then you can grab the recovery or fastboot zip files from Xiaomi Firmware Updater. All files are hosted on Xiaomi's servers, for reference.
Moreover, Adimorah Blog notes that Xiaomi has seeded MIUI 12.5 to the Mi 10 Pro. The Mi 10 Pro is one of five devices on Xiaomi first MIUI 12.5 wave, but the OS update is only available for Mi Pilot testers currently. So far, Xiaomi has distributed the upgrade to European devices (V188.8.131.52.RJAEUXM), but there should be a corresponding global ROM at some stage, too.
If you are interested in trying out V184.108.40.206.RJAEUXM on your Mi 10 Pro, then you can download the recovery zip from here. Please note that you must have an unlocked bootloader to flash V220.127.116.11.RJAEUXM, unless you have enrolled your device on the Mi Pilot program.
Unfortunately, Xiaomi continues to leave people in the dark about the dates for its MIUI 12.5 release schedule. The first and second waves should start receiving MIUI 12.5 this quarter, but it remains unclear when Xiaomi has scheduled this for. You can follow Xiaomi's progress on its Mi Community page.