Toast coconut on a baking sheet at 325-350°F for 5 to 8 minutes, stirring once, until golden. Cool completely.
Bake brownies in a parchment-lined 9x13 pan according to box directions. Cool completely before topping.
Melt caramel candies and heavy cream over low heat, stirring until smooth. Remove from heat, add salt, then fold in toasted coconut.
Spread coconut caramel evenly over the cooled brownie base. Press down gently to adhere.
Melt chocolate chips with coconut oil in 30-second microwave intervals. Drizzle in diagonal lines over the topping.
Refrigerate at least 1 hour until set. Lift out using parchment, slice into squares with a warm clean knife.