I tested it via
Fastboot boot twrp.img
Flashed recovery via twrp. After boot to recovery touch screen is not working. (all security off)
With "fastboot boot twrp.img" touch works well.
Update: Magisk flashing via twrp works
I've just noticed that on androidfilehorst a ROM for Mi11Lite5G (renoir) for TWRP flashing exist.
I did not found a TWRP up to now for Mi11Lite5G.
I can't check because I have to wait for bootloader unlook.