Preheat oven to 375°F (190°C).
In a bowl, combine cooked diced chicken breast, shredded mozzarella cheese, cooked and crumbled bacon, and diced green onions.
Add mayonnaise and ranch dressing to the mixture, stirring until creamy and well combined.
Roll out pizza dough on a floured surface into a rectangular shape.
Spread the creamy chicken mixture evenly over the dough, leaving a small border around the edges.
Roll the dough tightly into a log, sealing the edges to enclose the filling.
Place the roll seam side down on a baking sheet lined with parchment paper.
Bake for 25-30 minutes, or until the crust is golden brown and cheese is melted.
Remove from oven and let cool slightly before slicing diagonally into uniform pieces.
Arrange slices in a neat row on a rectangular white plate, garnishing with finely chopped green onions.