Preheat and prep: Heat oven to 350°F (175°C). Lightly grease a 9x13-inch baking dish.
Spread the fruit: Pour strawberry pie filling into the dish and spread evenly.
Scatter fresh strawberries on top if using.
Make cheesecake dollops: In a bowl, mix softened cream cheese, sugar, vanilla, and salt until smooth. Spoon small dollops over the fruit. No need to cover every inch.
Add cake mix: Sprinkle the dry cake mix evenly over the entire surface.
Do not mix it in.
Finish with butter: Drizzle melted butter evenly over the cake mix, trying to moisten as much as possible. It’s okay if a few dry spots remain; they’ll hydrate as it bakes.
Bake: Place the dish on the center rack and bake 40–50 minutes, until the top is golden and the edges are bubbling.
Rest: Let cool at least 15–20 minutes. This helps the cheesecake layer set and the juices thicken.
Serve: Scoop into bowls and top with whipped cream or ice cream if you like.