Flashing steps:

Crdroid v11.7 (Unofficial) for Mi A1 (tissot)

1. Boot to TWRP with tissot manager to enable treble, it will erase everything so keep backup before doing that

2. Boot to fastboot mode connect your device to your pc run fastboot boot ofox.img

3. Flash Rom zip enable adb sideload from ofox then run adb sideload rom.zip

4. Reboot device to fastboot then run fastboot boot boot.img

5. Reboot device to fastboot then fastboot flash vendor vendor.img (pixelvendor)

6. fastboot reboot.

7. If you need Gapps Reboot to rom recovery

8. Flash gapps

9. Reboot to system.