Picky eater 😫

My two year old doesn’t eat. She will have yogurt, blueberries, the occasional piece of toast and spaghetti. They are our safe meals. She will eat snacks till they come out of her ears. I’m at the point where I literally can’t feed her tea. She just doesn’t eat anything in the evening. I’m really getting concerned because she’s not getting anything that’s good inside her. I went to the doctor as she lost a bit of weight and they just said water and fluid is more important?! 😩 I’m getting so concerned does anyone have any advice or had a dietary specialist they could recommend?