I have installed latest stable rom for Mi 8 EE (xiaomi.eu_multi_MI8Explorer_V10.1.2.0.PEHCNFI_v10-9.zip).
I have activated Developer option.
It displayed in setting menu, but cannot open and back to top of setting menu.
Pie-based China Stable Rom for Mi 8 EE has released 2 weeks ago...
http://www.miui.com/download-345.html#503
When can we receive Pie-based eu Stable Rom for Mi 8 EE?
I have downloaded and installed this latest rom, but it has bug bootloop...
So I downgraded to V10.0.9.0 rom.
I reported this bug.
https://xiaomi.eu/community/threads/stable-rom-v10-0-12-0-for-mi-8-explorer.47993/
The latest rom for Mi 8 Explorer "xiaomi.eu_multi_MI8Explorer_V10.0.12.0.OEHCNFH_v10-8.1.zip" has a bug.
Install rom via TWRP and reboot.
The boot process does not end.
Stop with the boot logo displayed.
Please fix and update.
Regards.