Nearly 3 year old won’t eat

My son is not a very good eater at all. He knows good food and bad food. He will eat chicken nuggets, chips, pizza, likes beans sometimes & hoops. Picks at his spaghetti bolgenese, picks at sausages. Won’t touch potatoes, eggs, any veg, any fruit, pasta, I’m literally just wasting food he won’t touch it at all. He is a snacker rather than a meal person. So for breakfast he will have a waffle or brichoe roll or some cereal, lunch he will have smoothie, yoghurt, chocolate bar & crisps, sometimes jam sandwich, but he would want packet of crisps, chocolate bar, yoghurt or smoothie before lunch too & before dinner. He only has 2 bottles in the day. One morning one night. Anyone else going through the same?