My phone is still bricked: I flashed twrp-3.3.1-3-tucana-mauronofrio via fastboot, wiped all, formated data, rebooted recovery, flashed xiaomi.eu_multi_MINote10_MICC9Pro_20.2.27_v11-10. The phone stuck a the CC-logo for an hour. Back to the recovery I reinstalled maurofrio's recovery, the data were formated, with Mi_Flash I tried to flash tucana_global_images_V11.0.7.0.PFDMIXM_20200108.00 00.00_9.0_global_3d4450882b and got a bootloop. When I tried to come into the recovery I ended in the fastboot-mode.
In a ADB-Window I run flash-all.bat (tucana_global_images-V11.07..)
got the messages "Current device antirollback-version is greater than this package" and "Antirollback check error".
For other devices tools exist to solve this antirollback error (e.g. oncline and others). I hope somebody will develop it for the tucana, too.