[REQUEST] Lenovo Legion 5 (EUCNxxWW) BIOS FLASH

Hi,

Model : Lenovo Legion 5 15ARH05
BIOS : EUCN37WW
Fail during bios update.

I downloaded the bios from lenovo and extracted and tried to flash via USB but nothing happend, maybe i did something wrong.

It is possible to flash BIOS via USB for this model ?
Can you tell me all the steps for doing this ?
From where to start ?

Thanks in advance.