Struggling with dinners

My little boy is 16 months old and still only eats a really limited diet. For breakfast he’ll eat things like toast, crumpets, pancakes, porridge, weetabix. For lunch he’ll eat a tiny sandwich with cheese and ham or a bit of a savoury muffin. He’ll eat endless fruit and yoghurt. He won’t eat any ‘dinner foods’. I’ve made him spaghetti bolognese, curries, sweet and sour, cheesy potato pie, shepherds pie, hotpot etc etc. He won’t eat any of it! Anyone else’s little one like this? Any advice? 🙏🏻