The Redmi Note 8 Pro may have been spotted running Android 10 builds of MIUI 11 several times now, but a stable version may still be a way off. A fix for the European variant's Widevine DRM L1 certification will not arrive before next year either, according to Xiaomi Indonesia General Manager, Alvin Tse.
https://www.notebookcheck.net/No-Android-10-or-Widevine-DRM-fix-for-the-Redmi-Note-8-Pro-this-year-Xiaomi-confirms.447390.0.html