Your global phone (EEA/MI) CANNOT be locked with a TW (Taiwan) ROM, even if it's an official Xiaomi ROM. The message "Your device is destroyed" appears precisely when you lock the bootloader with a ROM that doesn't match the device's original region
Mini Militia App Lock
No, unfortunately, there is no simple or official solution to make the Xiaomi interconnection work between a European (EEA) ROM and a Chinese (CN) ROM.
Tutuapp
Phone not detected errors are often caused by missing or corrupted drivers. You need to make sure that the ADB and Fastboot drivers are installed correctly
After your device was bricked, this partition probably got corrupted. Since the IMEI is stored in this partition, it might become inaccessible, disrupting the boot process of MIUI or HyperOS.
Exactly, I wonder if one day they will finally take the time to develop a stable update version that will work pretty much for everyone.
_____________________________________________________
Appvalley TutuApp Tweakbox