In a medium bowl, stir together the rolled oats, vanilla protein powder, Greek yogurt, and vanilla extract until a thick, uniform dough forms.
Line a small rectangular container with parchment paper and press the oat mixture firmly into the bottom to create an even base layer.
In a separate small bowl, whisk together the almond butter and maple syrup until the mixture becomes a smooth, velvety caramel consistency.
Spread the almond butter caramel evenly over the oat base using the back of a spoon.
Place the dark chocolate chips in a microwave-safe bowl and heat in 15-second increments, stirring between each, until completely melted.
Pour the melted chocolate over the caramel layer and tilt the container to coat the surface evenly.
Sprinkle the sea salt over the wet chocolate and place the container in the freezer for 20 minutes or the refrigerator for 1 hour until the layers are firm.
Lift the parchment paper to remove the block from the container, slice into bars, and serve immediately.