Write oem file wich included in the File And Flash This Firmware In Upgrade Mode
Unlock Bootloader ( Load Fastboot ) By Chimera or hcu And use This File
MAR-L23B 10.0.0.251(C605E5R1P1)_Firmware_EMUI10.0.0_05016FTD
Only Unlocked Bootloader --- Flashing By HalabtechTool --- more info here (https://bit.ly/33zK24Q)