In a mixing bowl, whisk together Greek yogurt and honey or maple syrup until smooth and slightly glossy.
Line a baking sheet with parchment paper and pour the yogurt mixture onto it, spreading evenly with a spatula to about a 1/4-inch thickness.
Sprinkle the fresh or drained frozen berries evenly over the yogurt, pressing them lightly into the surface.
Scatter the toasted almonds and coconut flakes over the berries for added crunch and flavor.
Drizzle the melted dark chocolate across the surface in a zigzag pattern for a rich, sweet finish.
Place the tray in the freezer and freeze for at least 2 hours, until the yogurt is firm and frozen solid.
Once frozen, remove the tray from the freezer and gently break the bark into jagged shards with your hands or a knife.
Serve immediately for a crisp, icy crunch, or store in an airtight container in the freezer for up to a week.