I did not have any encounters with ES CPUs from AMD. I just remember my experience with Intel ES CPUs, which used a different set of keys for blob signing. I connected the dots and assumed that this is also true for AMD.

It is not about the configuration but rather a key burned into the CPU silicon that is used to verify the key used in blobs and the signatures of the blobs.

I see. So I need the appropriate BIOS or it won’t have the keys. Got it.