Thats a lot to explain buddy… start reading some “key” threads
Theres no need, in most cases, the use of an SPI IC programmer, at least for dump/read operations… to write yes, when the fw is locked in the Flash Descriptor and requires manual edit/unlock.
EDIT: Final note, not sure if applicable to your motherboard FRU (IQ1X0MS ?) but i couldn’t access write permissions to some regions, disabling all security features in bios and shorting ME_DIS jumper (IQ270MS) in a quick test made.