Flashing steps

Backup your data

Install this Orange Fox

Reboot to recovery

Format and reboot recovery

Flash firmware

flash ROM

Format data

Reboot to system

If u see error while installing, flash latest stock MIUI CN recovery rom, then immediately the necessary recovery, and try again

U can see installation steps in CrDroid ROM, cuz device tree from CrDroid, and installing RisingOS same as CrDroid.