TWRP Recovery for Xiaomi Mi 6 (sagit)
I made the TWRP with F2FS updated to latest . You can download the img and flash it from fastboot.
Bootloader unlocked required!
Unlock bootloader (skip if you have already unlocked it)
Reboot Mi6 into fastboot mode
Flash using fastboot
fastboot flash recovery twrp-18.104.22.168-sagit.img
Github release page