The Mi 11 Ultra is a fairly recent release from Xiaomi and the phone initially launched with Android 11 and MIUI 12.5 on top. No official information regarding the beta version of Android 12 has been disclosed so it's interesting to see the handset making an appearance on Geekbench 5 with the latest Android OS.
Mind you, this is the global version of the device given the model number listed on Geekbench - M2102K1G. This is probably the first sighting of the Mi 11 Ultra running Android 12 and suggests that Xiaomi will soon have more to share about the update.
Perhaps an Android 12 open beta program will be announced in the following weeks so make sure you follow the news and be ready as these programs often have limited spots.