Xiaomi has taken to its official Weibo account to enlist about 27 devices that are eligible to receive a closed beta rollout of the MIUI 12.5 update. The list of devices includes the upcoming Mi 11 flagship and goes as far back as the Redmi Note 7 released in early 2019. The closed beta is currently limited to China and a global release will follow soon.
https://www.notebookcheck.net/Xiaomi-enlists-27-Mi-and-Redmi-devices-eligible-for-MIUI-12-5-closed-beta-Redmi-Note-7-included-but-Redmi-Note-8-Pro-Note-8T-and-Note-9S-fail-to-make-the-cut.515535.0.html