There is no geographic entity called "New France" that was "discovered." Rather, New France (Nouvelle-France) was the name of the vast French colonial territory in North America, established during the 16th–18th centuries.
New France's heritage endures in Quebec's French-speaking culture, place names across the Midwest (Detroit, St. Louis, Baton Rouge), and the legal traditions of Louisiana.
So while no "New France" was discovered, French explorers and settlers *established* a colony that profoundly shaped North America.