I had a tummy tuck yesterday and everything went incredibly well. Is it normal to be hungrier after surgery?

Glad to hear that all went well with your procedure.  More often than not, patients post op tummy tuck feel that they get the sensation of fullness with less intake than preop.  Also it is common that the medications for pain relief can have the side effect of nausea which makes people shy of the fridge.  Your body will need a lot of protein and calories to provide resources for your body to heal.  A higher caloric intake during the first few weeks post op wouldn't concern me.  Sounds like you are very discriminating about your diet which is a plus and unfortunately not common.  Best wishes with your recovery.