Submerge the apple slices in the lemon juice and water mixture for 1 minute to prevent browning, then remove and pat thoroughly dry with paper towels.
Arrange the dried apple slices on a baking sheet lined with parchment paper, placing them close together in a single layer.
In a microwave-safe bowl, combine the caramel bits and heavy cream. Heat in 30-second intervals, stirring in between, until the mixture is completely smooth.
Drizzle the melted caramel evenly over the apple slices, using a spatula to spread if necessary to cover most of the surface.
Place the chocolate chips in a separate microwave-safe bowl and heat in 30-second increments until melted and smooth.
Drizzle the melted chocolate over the caramel layer in a decorative pattern.
Immediately sprinkle the chopped pecans and flaky sea salt over the wet chocolate.
Refrigerate the tray for at least 45 minutes to 1 hour until the caramel and chocolate are firm.
Slice or break the set bark into individual portions and serve immediately.