I've been using Xiaom.eu version 12.0.6 Stable(Xiaomi Mi9) for a few days now. Previously, I was using the Official version 12.0.6 and I could change the System and Vendor sections as I wanted. My TWRP, Magisk and Root File manager applications are the same as in the Official version, but I cannot change the files in the system partition and create new files in Xiaomi.EU. Where does the problem come from? Isn't the System partition writable in Xiaomi.EU versions?