Orange Layer Cake with Buttercream Frosting and Berries

INGREDIENTS

• 1 4.4-ounce container fresh blueberries
• 9 large egg whites
• 4 1/2 cups cake flour
• 1/4 cup orange marmalade
• 2 cups sugar, divided
• 1 cup water
• 1 cup plus 2 tablespoons (2 1/4 sticks) unsalted butter, room temperature
• 5 1/2 cups powdered sugar, sifted
• 4 1/2 teaspoons baking powder
• 1 cup sugar
• 1 1/2 cups whole milk
• 1 1/2 teaspoons vanilla extract
• 1 12-ounce container fresh strawberries
• 1 cup (2 sticks) unsalted butter, room temperature
• 1 teaspoon salt
• 1/2 teaspoon orange-flower water
• 1 6-ounce container fresh raspberries
• 12 ounces cream cheese, room temperature
• Nonstick vegetable oil spray
• 1 tablespoon orange-flower water*