Preheat your oven to 425°F (220°C).
Spread the frozen seasoned French fries evenly on a large baking sheet. Bake according to package instructions until they're golden and crispy, usually about 25-30 minutes.
While the fries are baking, in a mixing bowl, combine the shredded chicken with the BBQ sauce, ensuring the chicken is well-coated.
Once the fries are done, remove them from the oven and sprinkle the shredded cheddar and mozzarella cheeses evenly over the hot fries.
Next, distribute the BBQ chicken mixture over the cheesy fries, ensuring an even layer.
Add the crumbled turkey bacon on top of everything, then return the baking sheet to the oven for an additional 5-7 minutes, or until the cheese is melted and bubbly.
Remove from the oven and let it cool for a few minutes. Drizzle with ranch dressing, if desired, and garnish with sliced green onions before serving.