Is chronic fatigue familiar after stopping steroids and biologics?

I’m a parent to someone with eczema, and they had a severe multi year flare flare, which got progressively and was treated with three years of topical steroids, tacrolimus, and dupixent then nemluvio.

We are three months free of those, but they have chronic fatigue all summer, and now if they have a skin flare will sleep 10 to 15 hours. Is this a familiar experience to anyone?
We are double checking with pcp this week, but was curious if anyone else went through this?