People keep saying we should be happy

My non-verbal toddler loves her food. And even after she's eaten, and sees someone else eating, she goes to them, strangers even. She wants to eat oue food as well when she's done with hers. She follows me to kitchen and when I try to leave, she cries, expecting a snack. Even though she's had many snacks. And yes, she eats balanced diet, loves her veggies. And has multivitamins. She picks food off the floor and put in her mouth, doesn't matter where. We have no idea what else to do really. Just hoping it's a phase she outgrows.