Download : https://mega.nz/file/gpgWmBwa#MqToq4Htapb4cd-nwzcBNbpAbuBD_TREbPvK9bFHsmI
-f2fs support(flash f2fs patcher from tweaks section and convert data and catch(optional) to f2fs to use f2fs).Must use f2fs supposed Kernel.
-Can flash and backup system,vendor and product.
-You can flash gsi and ub port image directly.
-Can resize system and vendor partition to flash Large image size ..
(Flash system vendor resize zip from tweaks and reboot to recovery
-system, vendor, product rw support (flash system rw zip from tweaks section)
-After resize you can flash system up to 3.4 gb and vendor up to 900 mb.
-Disable shrp theme to prevent bootloop.
-If you are in miui you need to flash patch vbmeta from below link.
Flash it after flash the recovery..
Download and flash from any recovery or extract and flash recovery.img from pc
Sorce (twrp tree) : https://github.com/Arafattex/device_xiaomi_lancelot
Screen shot :