Peel, halve, and core three firm pears. Melt unsalted butter in a medium skillet over medium-high. Add pears, cut sides down; cook until browned, about 5 minutes. Add Pinot Noir, pomegranate juice, 1/4 cup maple syrup, vanilla extract, and cinnamon stick. Cover and simmer until tender, about 15 minutes. Let cool slightly. Stir together plain 2% reduced-fat Greek yogurt, crème fraîche, and 1 tsp. maple syrup in a small bowl. Spoon over pears; garnish with lemon zest.