To run an GSI on your Mi pad 5 :
Unlock bootloader
Download an arm64 AB gsi: https://forum.xda-developers.com/f/treble-enabled-device-development-a-ab-roms.7260/
I used system-roar-arm64-ab-vndklite-vanilla.img by Phh
Download vbmeta.img from google
Reboot to fastboot
Open an cmd:
fastboot flash vbmeta vbmeta.img
fastboot reboot fastboot
fastboot flash system system-roar-arm64-ab-vndklite-vanilla.img
fastboot reboot recovery
Make an factory reset
Reboot
Unlock bootloader
Download an arm64 AB gsi: https://forum.xda-developers.com/f/treble-enabled-device-development-a-ab-roms.7260/
I used system-roar-arm64-ab-vndklite-vanilla.img by Phh
Download vbmeta.img from google
Reboot to fastboot
Open an cmd:
fastboot flash vbmeta vbmeta.img
fastboot reboot fastboot
fastboot flash system system-roar-arm64-ab-vndklite-vanilla.img
fastboot reboot recovery
Make an factory reset
Reboot