In the case of Japan, it's likely an issue with Japanese regulations.
We have a very strict radio law that applies to anything that can produce radio or em waves
That includes motherboards, since they can technically emit on those frequencies.
From what I have seen, the framework laptop motherboards appear to abide by that law. However, I assume it's just expensive to figure out in the first place.
LTT video specifically states that they were also able to get the Desktop model to be compliant with the (US, I suppose) EMI laws. He also shows the shielded side of the case (only one side is shielded and that was supposedly enough to pass).
We have a very strict radio law that applies to anything that can produce radio or em waves
That includes motherboards, since they can technically emit on those frequencies.
From what I have seen, the framework laptop motherboards appear to abide by that law. However, I assume it's just expensive to figure out in the first place.