Xiaomi is reportedly working hard on 200 W and above fast charging, foldability, 2K screens, and the under-display selfie camera. There has been speculation that some of these features may end up being incorporated into a Xiaomi Mi 11 Pro smartphone, while work on a Mi Mix 4/Mi Mix 2021 is apparently on hold for the foreseeable future.
https://www.notebookcheck.net/Mi-Mix-4-on-hold-as-Xiaomi-focuses-on-200-W-plus-charging-under-display-camera-and-2K-screen-for-a-potential-Mi-11-Pro.502087.0.html