How to install a custom ROM on Xiaomi Mi A2 Lite

I am trying to use for upgrading android images in eMMC Nand flash Please suggest if it is feasible to

Error applying update: 7 To flash additional zips, please reboot recovery to switch to the updated slot

togel slot 4d flashing full zip of ROM again and then flash twrp again? Flash twrp, then reboot recovery, reboot to the other slot, flash twrp again, reboot recovery

toto slot When I try to install it with twrp or orange fox then it says Flashing AB zip to inactive slot: A To flash additional zips, please reboot