After sending out stable MIUI 12 updates to the Redmi K20, MI 9T, and Mi 9, Xiaomi may now be looking towards continuing the MIUI 12 rollout with its other phones. It has now opened its beta-testing program, and owners of the Redmi Note 7, Redmi Note 8 Pro, and Poco F1 can enlist.
https://www.notebookcheck.net/Redmi-Note-8-Pro-Redmi-Note-7-Poco-F1-owners-can-now-register-as-MIUI-12-beta-testers.469583.0.html