try this recovery twrp_violet_test_01-01-2021
install from fastboot mode
fastboot flash recovery violet01-01-2021test.img
fastboot reboot ( use the volume + button to boot)
The solution for lavender.
Download keymaster file.
Rename to km4.mbn
flash from fastboot mode.
"fastboot flash keymaster km4.mbn"
Boot to twrp , format data and reboot to system
in black screen wait a while(5-10 sec) and run again.
@Diking thanks..
flash vbmeta
flash twrp
reboot with vol +
wait 5-10 sec , run dmesg,logcat.
I haven't this device but installing to mia2 and redmi note 7
At the first logcat
SUCESS::ioctl call to create encryption key for usage 4 success with ret = 0
shows that is in twrp menu and running decryption
"sorry for my bad English"