A list of alleged Xiaomi smartphones that have been lined up to receive an update to MIUI 12 has been published online. A total of 23 devices are included on the list, which features phones from both Xiaomi and Redmi brands. The Mi 10, Mi 9, Mi Mix 3, Redmi K30, Redmi Note 8, and Redmi Note 7 are just some of the popular smartphones listed.
https://www.notebookcheck.net/Alleged-list-of-Xiaomi-smartphones-tipped-for-upcoming-MIUI-12-update-includes-Xiaomi-Mi-10-Xiaomi-Mi-Mix-3-Redmi-K30-and-Redmi-Note-8.460351.0.html
This rumor makes only partly sense.
Redmi Note 7, Redmi Note 7 Pro, Note 8, but not the Redmi Note 8 Pro?
Nothing for the Mi MIX 3 5G sadly, but not surprised :(