Your daughter needs calcium and fats as well as Vit D but she can get those in other ways. My granddaughter, because she was allergic to milk, drank rice milk which is fortified with calcium, Vitamins A, D, and B12. She probably drank 2-3 8oz, glasses a day. Some of that was on cereal. She still loves hot chocolate. They make a chocolate flavored rice milk but she preferred adding chocolate syrup at home.
Fortunately she could eat cheese which also has calcium and fats.
I think there are several foods that provide calcium as well as those vitamins. Dark green leafy vegetables have calcium and vits and mins. However, I learned in a nutrition class that they also contain oxalic acid which makes it difficult for the body to utilize the calcium.
Also from nutrition class is the information that if you combine even a small amount of animal protein with legumes (beans of all sorts) the dish or meal provides complete proteins. Legumes do have protein but not all that the body requires. Whole grains also provide a small amount of protein. Because there are several different proteins we need to eat a variety of foods with protein.
So, your daughter doesn't need milk. But she needs a diet high in calcium to make the bones she's building strong. Calcium is also needed by other parts of the body. She doesn't need meat. She needs fats for a healthy brain and nervous system. And of course she needs proteins because that is the basic building block for our body. It's more difficult to get all of the required nutrients without meat but with planning it can be done.
I'm sure there are books describing a vegetarian based diet that could help you. The Internet most likely has lots of information.
I have a cousin who grew up in a vegetarian home and she matured just fine. They did drink milk and had eggs (has protein and fat soluable vits)