Enable USB-Debugging and unlock phone

# Connect phone to Wifi
Settings > About Phone > Build number > tap 7x times to become developer
Settings > System > Advanced > Developer Options > OEM unclocking
Settings > System > Advanced > Developer Options > USB Debugging > OK

Unlock phone

# Connect phone to computer
adb devices
# Accept "Allow access with your computer RSA key" on phone
adb reboot bootloader
fastboot oem unlock

Boot bootloader

Power Off phone
Hold volume_down + power

OPTIONAL: Recovery phone with original Xiaomi image to update firmware

Flash custom image
https://arrowos.net/download
# ArrowOS download: https://get.mirror1.arrowos.net/download.php?token=oD03QRrG9umnU1Egj6VspKXNwaiIlcYSOqbfCdyP4x8WzMtT7kL2hHZFJAv5&version=arrow-11.0&variant=community&device=daisy
#OpenGA apps: https://netix.dl.sourceforge.net/project/opengapps/arm64/test/20210130/open_gapps-arm64-11.0-pico-20210130-TEST.zip
NikGapps: https://sourceforge.net/projects/nikgapps/files/Releases/NikGapps-SL/18-Feb-2023/NikGapps-core-arm64-12.1-20230218-signed.zip/download