My dd has never been that interested in food.
That's my DS. If I didn't try and get something in them he would happily go the entire day without a bite. Some days the only thing I can convince him to eat is a bite of chocolate (literally a bite), other days (usually when he's 'stocking up' for another growth spurt) he'll eat normal amounts, but even then he's incredibly picky. It's nearly impossible to get fruits or veg into him. This was a boy whose favorite food when he was weaning was cut up peas, carrots, corn, broccoli, beans, etc All he ever used to eat was veg! He'd gum pieces of melon to death all day. Then at 2 Boom! He eats nothing.
His GP says to wait it out, and it should change after 5 or so. Problem is he's already 98th percentile for height and he's built broadly, and sometimes he gets so thin I worry. I don't know where he finds the energy to run around as much as he does!
I'm also fairly certain that when he does start eating normally he's going to pile on weight, regardless of what he eats, because he's built exactly like my brother, and my brother was heavy until he became a teenager and shot up even more. Even now, the way my brother is built (broad) he can go from muscular to fat pretty quickly if he doesn't workout.
On the flip side DD is built like a bird (but with the appetite of a hippo). She loves food, any and all of it! Especially fruit. She's tall but tiny, with fine features. She's like DH's mother and then women of that side of the family, and I have no doubt she'll be tall and thin her whole life no matter what she eats.