Not eating anything ?

HELLO MY FIANCÉ IS 4 weeks and 6 days .. pregnant and she is not eating enough. Her appetite seems to be gone. And I am here to tell you this woman can EAT! 🤣😂 so I’m wondering why she seems to be full and not eating I can get her to eat at least once a day and she usually eats all day… is this a common symptom of pregnancy? If anything I thought she’d be eating more.