There are certainly foods that my daughter ate as a toddler that she will not touch now. I think some of that is normal. She will not eat tomatoes (except in tomato sauces) but would eat them by the handful as a toddler.
I've always heard that taste buds change every 7 years or so. I don't know if there is any validity to that or not.
If everything ELSE is normal with her, then I would try to not give it too much attention. However, if she is refusing most foods, suddenly, then I'd do a quick inventory (in my head) as to whether there are any signs that may indicate an eating disorder. It can start fairly young with some kids and girls are more affected than boys.
Does she seem to have a healthy body image? Is weight or shape a big issue in your home? Among her friends? Does she suddenly exercise a lot? When she turns up her nose at whatever it is she won't eat, does she find something else to eat or she just sort of blows it off and excuses herself from the meal?
(I know my daughter is picky, but she will not go hungry. She'll find something to eat that she DOES eat, if she doesn't like the meal.)
If it continues, and seems outside the normal range of changing taste buds, you might bring it up at her next well visit to the doctor.