i found unlocked FB07 for your model ,.,.but all flash is risky !!
i will try to check what is different in unlocked and your file and compatibility verification
but better try RU.EFI “no flash way” or must wait for correct mod “bad flash - dead mobo !!!”
edit
check topic here ,.,files is identical “but any FLASH is always risky”
FB07 / BIOS Date: 02/26/2021 19:16:36 Ver: X5LQVC0739