Pumpkin Pie French Toast Bake

Name: Pumpkin Pie French Toast Bake
Ingredients: Cooking spray; 1 (1-lb.) brioche loaf, sliced 1 thick; 1 (15-oz.) can pumpkin puree; 6 large eggs; 3/4 (160 g.) packed dark or light brown sugar; 2 tsp. pumpkin pie spice; 2 tsp. pure vanilla extract; 3/4 tsp. kosher salt; 1 1/2 c. whole milk; 1/2 c. heavy cream; 6 tbsp. unsalted butter, melted; 3/4 c. (160 g.) packed dark or light brown sugar; 1/2 c. (60 g.) all-purpose flour; 1/3 c. (30 g.) rolled oats; 1/4 c. (30 g.) pecans, finely chopped; 1/4 tsp. kosher salt; Pure maple syrup, for serving