You can try baby led weaning. My little girl suddenly don’t eat the solid I cooked around 8 months, not that she is sick or no appetite. She keeps reaching her hand to grab the bowl and shut her mouth when I spoon feed her. When I put food on the table she would pick it up herself and put it in her mouth. It going to get messy but at least she eat. I still spoon feed some liquid and teaching her to eat using spoon.
Can she finish her lunch and tea time in school? My LO same age as yours, she can tell me when she doesnt like the food (from facial expression) so what i do is everytime i cook i ensure there’s smth sweet like pumpkin or carrots I also got give her instant food and seems like she accept it more, i bought yummy bites brand and eunsik