It does seem weird, though, that she doesn’t know Han is in charge of the Endor mission until it’s mentioned in the briefing.
Not every member of the military, ranking or not, knows the doings of the entire operation.
Han was keeping it from her because he knew she’d be upset & worried. This is before Han forgets that they’re in love. That stupidity happens later in the film.
Amnesia is apparently a side effect of the freezing process. Han evidently recovers pretty quickly from hibernation sickness otherwise. 😉