The stable MIUI 12 update for the Xiaomi Redmi Note 8 may arrive after the Dragon Boat Festival, according to Piunikaweb. The initial MIUI 12 build may upgrade the Redmi Note 8 to Android 10, too.
https://www.notebookcheck.net/Stable-MIUI-12-and-Android-10-updates-for-the-Xiaomi-Redmi-Note-8-may-arrive-simultaneously-after-the-Dragon-Boat-Festival.477455.0.html