i doubt that. it's not only the microcode, the memory controller requires a different initialisation (Intel Memory RC)I have a cascade lake CPU on hand, I could try swapping the microcode and see if it boots.
you all have to get the 2nd gen BIOS if you want to run cascade lakes.
i tried to get one for my MS Olympus boards from the motherboard OEM (Wiwynn). but without NDA authorisation by Microsoft the BIOS is not available.
the MS Olympus is based on Project Olympus, but this project does NOT include any firmware. Firmware is copyrighted/licensed.