Prepare Cookie Crumbs - Preheat the oven to 350°F. Line a standard baking sheet with parchment paper. Divide crushed cookies into two small mixing bowls. Pour one box of strawberry gelatin over one bowl and stir. Add 2 tablespoons melted butter to the plain crumbs. Mix red food coloring with remaining butter and pour over the gelatin crumbs, stirring until well combined. Spread both crumb mixtures on the baking sheet and bake for 10 minutes. Allow to cool completely.
Bake Strawberry Cake Layers - Preheat oven to 350°F and spray two 9-inch round cake pans with baking spray. Mix cake mix, eggs, melted butter, milk, and strawberry gelatin until smooth. Divide batter between pans and bake for 24-28 minutes until a toothpick comes out clean. Allow cakes to cool completely on a rack before removing from pans.
Prepare Cheesecake Layer - Reduce oven to 325°F. Whisk together sugar and cornstarch in a small bowl. Line the bottom of a 9-inch springform pan with parchment paper and spray with nonstick spray. Beat cream cheese, heavy cream, and vanilla until smooth. Add eggs one at a time at low speed. Gradually add the sugar-cornstarch mixture and mix until smooth. Pour into springform pan.
Bake Cheesecake - Bake at 325°F for 40 minutes. Turn off the oven and leave the cheesecake inside with door closed for an additional 20 minutes. Remove, cool on a rack for 30 minutes, then cover and freeze for 1 hour.
Make Frosting - Beat cream cheese, heavy cream, and butter for 1½-2 minutes until creamy. Add vanilla, then gradually add powdered sugar and mix until smooth.
Assemble Cake - Place one strawberry cake layer on a serving plate. Spread ¼ cup frosting over it. Remove cheesecake from freezer, release from springform pan, and place on top of the frosted cake layer. Spread another ¼ cup frosting over the cheesecake. Top with the second strawberry cake layer.
Finish and Decorate - Frost the entire cake with remaining frosting. Break cookie crumbs into small pieces, sprinkle over the top, and gently press onto the sides of the cake to create a decorative coating.