The Redmi Note 9 Pro will have received MIUI 12 globally before the end of the month, Xiaomi has confirmed. Many global and European handsets remain on MIUI 11, although all other variants should have already received MIUI 12.
https://www.notebookcheck.net/The-Xiaomi-Redmi-Note-9-Pro-will-receive-MIUI-12-across-all-variants-before-the-month-is-out.503805.0.html