Yeah, the mismatched documentation styles are my main concern. I actually think that if I just took my former diagnosis letters from my US doctors plus the diagnosis of CFS and chronic pain I got from a doctor here to Korean doctors for a fresh assessment, they probably would be quick to confirm.

Like, the Korean system for disability assessment is by all accounts very straightforward, and derived from medical diagnosis more than function and work assessments. But that's not what the US system cares about, they really just look at whether you can do work.