Stir together flour, date sugar, baking powder, and salt in a large bowl. Cut butter into flour mixture with a pastry cutter or two knives. It should resemble coarse cornmeal when fully combined.
Whisk together orange juice and vegan yogurt in a small bowl. Stir juice mixture into flour mixture, slowly adding until dough just begins to come together. Fold in chocolate chips. Chill dough mixture for 1 hour.
Lightly coat a 9 inch cast iron skillet with cooking spray and press dough into skillet so that it fills completely. Cut it into 9 slices.
Preheat oven to 350º. Sprinkle scones with coconut sugar, if desired and bake for 30-35 minutes or until golden brown.