what is the model name of the panel used in the mi 9? Maybe at the vendor page we can find out if it's officially designed to run with 84 hz.
Awesome work so far!
for me it drained up to 2% per hour.
I could reduce it to 0.5% per hour just by turning off bluetooth, maybe that helps you as well
the global version package has got a red sticker on it stating "Global Version"