Preheat the oven to 400ºF.
Line a baking sheet with parchment paper.
Arrange the tortilla chips on the baking sheet so that the whole tray is evenly covered.
Pour the salsa and queso over the chips evenly. You may need to use a spoon to spread things out evenly.
Sprinkle the shredded mozzarella over the tortilla chips.
Top the nachos with the barbecue chicken, pickled jalapeños, and red onion.
Bake in the oven for 12-15 minutes.
Let cool before serving with sour cream and guacamole.