Celebrity "Exhaustion"

Old pediatrician, ignorant about adult medicine. Just wondering what some of y'all adult folks are doing diagnosing celebrities (most recently Megan Thee Stallion) with "exhaustion" or if the PR reps are making this up for the media. I can't even find an ICD-10 code for this wording. I have used "fatigue" of course, who hasn't, but exhaustion is just so dramatic lol. It makes me roll my eyes. What are the diagnostic criteria for "exhaustion"? We don't do this in peds.