Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
Spread the pretzel sticks evenly on the baking sheet, forming a single layer.
Bake the pretzels for about 5-7 minutes to crisp them up slightly, then remove from the oven and let cool for a few minutes.
Meanwhile, in a microwave-safe bowl, combine the semi-sweet chocolate chips. Heat in the microwave in 30-second intervals, stirring each time, until the chocolate is completely melted and smooth.
Drizzle half of the melted chocolate over the cooled pretzels, making sure to cover them evenly.
Drizzle the caramel sauce over the pretzels and chocolate. Use a spatula to gently spread it for even coverage.
Pour the remaining melted chocolate over the caramel, ensuring it's layered beautifully over everything.
Sprinkle the chopped nuts on top, if using, for an added crunch and texture.
Finish with a light sprinkle of sea salt to enhance the flavors.
Place the baking sheet in the refrigerator for about 1-2 hours, or until the chocolate and caramel have completely set.
Once set, break the bark into pieces using your hands or a knife.