Xiaomi Mi A3

Short summary

Tested by @asuvoro on Pixel Experience Xiaomi Mi A3 - Android Q 10 All works. Nothing special at this time known.

GSI's not tested maybe or you should fill it in

DO NOT JUST COPY & PASTE COMMANDS , SHOULD HAVE KNOWLEDGE PRIOR TO FIDDLING WITH DEVICE.

adb reboot to bootloader
fastboot devices
fastbooot getvar current-slot (CHECK FOR ACTIVE SLOT)
fastboot --disable-verification --disable-verity flash vbmeta vbmeta.img (USE VBMETA.img FROM STOCK ROM OF MI A3)
fastboot erase system
fastboot flash system name-of-gsi.img
(WHILE HOLDING VOLUME+ KEY) fastboot reboot
In stock recovery , you should see NO COMMAND. Now , while holding POWER key press VOLUME+ key and you should see Recovery commands > Choose Wipe data/Factory reset > Reboot to system.

System should BOOT now.

Tested GSI images -

Itel