Preheat the oven to 400°F. Line a baking sheet with parchment paper and set it aside.
Place 1 1/2 cups of the shredded mozzarella cheese and the cream cheese in a large microwave-safe bowl. Microwave on high for 30 seconds. Stir well, then continue to microwave in 15-second increments, stirring between each interval, until the cheeses are completely melted. Stir until smooth.
Remove the bowl from the microwave and quickly stir in the egg and almond flour. Work the mixture with your hands until the ingredients are well combined and form a ball of dough.
Place the dough in the center of your lined baking sheet. Use your hands to press it into a large rectangle.
Bake the pizza crust until it just begins to brown slightly around the edges, about 8-10 minutes.
As the crust is baking, place the bacon in a skillet over medium heat. Cook until it reaches your desired crispness, which typically takes 8-15 minutes. Remove the cooked bacon from the skillet and drain it on paper towels or a cooling rack. After it cools, crumble or chop it into small pieces.
Remove the pre-baked crust from the oven. Reduce the oven temperature to 350°F.
Spread the ranch dressing evenly over the cooked pizza crust, then top with the shredded chicken, crumbled bacon, and remaining 1/2 cup of shredded mozzarella cheese.
Bake until the cheese is melted, about 8 minutes. Cut into pieces and serve immediately.