My kid wont eat

My son is 19 months old he eats

Puffs, pouches, apple sauce, and French fries regularly. He pretty much lives off of them🤦‍♀

Sometimes he'll eat rice, oatmeal, pizza and chicken but it's rare. I have desperately been trying to get him to eat new foods but he refuses and will gag when I make him try something new. He's at a good weight but I'm worried about him developmentally because he doesn't want to eat anything but those few things. Is this concerning? Like should I call his pediatrician tomorrow or is this normal for his age?