Check the ME version and download the corresponding version of CSME/ME System Tools, in FPT folder make full backup image “FPTW64 -d backup.bin”, for mod image “FPTW64 -bios -d bios_region.bin”.
It’s an old dell device there should be still use AMI platform.
Main root menu: [Guide] HowTo Unlock a Tongfang Chassis BIOS
Sub menu: AMIBCP 4.55