I really can not understand what is happening.
This problem exists only in official roms..
Ιn this case we suggest copying the rom to the sdcard or OTG
one last test.
Install the latest fastboot rom android 11 china version.
will start with this rom?
If yes install latest eu rom with format data .
Attention
Don't lock bootloader with this rom
the after is wrong...
If installations is completed without fails and format data works I haven't any other ideas to tell you.
The tucana is china version or global?