For the better part of the last century, the names Dior and Chanel were synonymous with luxury goods: custom-made gowns, stylish handbags, elegant fragrances and fine jewelry. But when most people think about these iconic fashion houses, they often don’t think about the historical figures whose names they bear: Christian Dior, whose debut collection signaled a return to ultra-femininity and opulence after the horrors of World War II, and Coco Chanel, who was credited for revolutionizing the way women dressed in the early 20th century. “The New Look,” which premiered Wednesday on Apple TV+, focuses on the lives of Dior...