Xiaomi has suspended MIUI 12 beta updates for the Xiaomi Mi 10, Xiaomi Mi 10 Pro, and Redmi K30 Pro smartphones because they will be busy adapting to the upcoming Android 11 OS. It's also possible to get the Android 11 beta firmware for the Poco F2 Pro, as it is just a rebranded Redmi K30 Pro, but it won't have Google Services at the present.
https://www.notebookcheck.net/MIUI-12-beta-updates-suspended-again-for-Xiaomi-Mi-10-Mi-10-Pro-and-Redmi-K30-Pro-as-they-start-receiving-Android-11.477164.0.html