I do in phases. A week or so of napping every day, then a week or two without.
I certainly could not work though.
Some of those info/scales of ME/CFS say “moderate” need to rest in the afternoon, some say nap.
Many say moderate May need to use a wheelchair when out - I wouldn’t manage a wheelchair, but I can walk.
I hate all the fiddling with scales/levels of severity it’s another one of those “shuffling the deckchairs on the Titanic” activities which everyone seems to want to endlessly tinker with, like pacing guides.