I've been struggling with fatigue since earlier this year after I got (what I presume to be) another bout of Rona. It is debilitating fatigue, where I can get 14 hours of sleep and I'm still exhausted, focus and brain power are elusive faint memories. It sucks.
I've found two things that beat back the fatigue into something manageable; nicotine gum (2mg, once a day), and as many carbohydrates from fresh ripe fruit as I can stuff into my face. I'm concerned that a good supply of fruit will be lacking as winter sets in. I'm still not sure what I'm going to do about that.
While there is a ME/CFS long covid subtype, there are many others as well. In other words, not everyone who has long covid suffers from fatigue.
It could be likely that the ME/CFS long covid subtype may share a common pathology with the varying CFS hypothesized pathogens(influenza, etc).
So chronic fatigue syndrome?