What’s the difference between being “at peace with it” and being emotionally numb?

At peace with it is real, genuine - it feels good and natural.

Emotionally numb is faking it. You know the other show is gonna drop but you are emotionally spent and really don't give a shit anymore.

Peace and numbness don't go hand in hand. Numbness is numbness, peace is letting go

The answer is implicit in the question! Being at peace with something is an emotional state.