Team Win Recovery Project 3.x, or twrp3 for short, is a custom recovery built with ease of use and customization in mind. It is a fully touch driven user interface no more volume rocker or power buttons to mash. The GUI is also fully XML driven and completely theme-able. You can change just about every aspect of the look and feel.
Note: this device has anti-rollback
fastboot boot twrp-sakura.img
it’ll boot to TWRP… now flash the recovery again with TWRP
Downloads: TWRP v3.2.x for Redmi 6 pro
Device tree: here