It’s me, Vistulack and I have and Update:
thanks to @Sophon and @h9419 XDA forum user I have managed to succesfully install Win 11 on Mi 8 
https://forum.xda-developers.com/t/q-project-renegade-windows-arm64-on-dipper-mi-8-boot-partition-none.4445347/#post-88219547
To sum up:
This time I have install drivers in ver. 1.1.1 https://github.com/edk2-porting/WOA-Drivers/releases/tag/v1.1.1
and after installation of dism I have used not only:
bcdedit /store Y:\efi\microsoft\boot\bcd /set {Default} testsigning on
bcdedit /store Y:\efi\microsoft\boot\bcd /set {Default} nointegritychecks on
but also :
bcdedit /store Y:\efi\microsoft\boot\bcd /set {Default} recoveryenabled no
Also I wouldn’t recommend using Windows 10 home, as screen keyboard wasn’t working there; I came across error:
C:\Windows\system32\osk.exe
A referal was returned from the server
This error wasn’t seen on Windows 11 Pro
During install, I had also a problem with WiFi connections, but after putting mobile in the near of router I was able to connect (this issue camu up only during setting account)
Anyways, now I have other problem.
If I press turn off while charging, either from Windows or bootloader level, I end up back in bootloader menu, without knowing what is the battery level is (in Windows is still shows 0%, which is odd, because phone is still running).
Now I need to check how to enable turning phone off when charging (or put it into charging mode, with only battery level shown)
EDIT: ok, it looks like the best mode to charge the phone is setting it to recovery mode.
Windows 11 seems to consume the battery faster than I charge it, but it can be also issue with my phone.