Line a baking sheet with parchment paper.
Melt the sugar-free dark chocolate chips and coconut oil together in the microwave in 30-second bursts, stirring between each, until completely smooth and glossy.
Pour the melted chocolate onto the prepared baking sheet and spread it into a thin, even layer about 1/4 inch thick using an offset spatula or the back of a spoon.
Immediately scatter the chopped roasted almonds, coconut flakes, and crushed freeze-dried raspberries over the chocolate. Press the toppings in gently so they stick.
Sprinkle flaky sea salt generously over the top. Refrigerate for at least 30 minutes until the chocolate is completely firm.
Break the bark into rustic, irregular pieces. Store in an airtight container in the refrigerator for up to 2 weeks.