Has there been any progress in regards to support for the Smart Pen?
Do we know what part might be missing from the firmware image? Some kernel module that might be in the open source kernel release?
Best
I want this feature too. I also really want to get out from MIUI. I like having total control of my device and MIUI doesn't seem to give me that. Tried GSI, was great but the pen did not work

I might be wrong but I'm getting the feeling that neither Xiaomi nor the community is really active on the Xiaomi Pad 5.
Thus, I'm trying to get myself the feature I want.
I don't know anything about Linux/Android kernel but I want to give a try to figure out how to get the pen work.
I can't promise anything but I may have a clue for the keyboard. I'm pretty confident that the pen is hidden somewhere too.
Unfortunately the documentation seems non-existent (I builded the doc) and I can't read Chinese, that might have been useful.