Preheat your oven to 375°F and line a baking sheet with parchment paper.
In a medium mixing bowl, combine the whole wheat flour, baking powder, sea salt, and 0.75 cup of Greek yogurt.
Stir until a thick dough forms, then transfer it to a lightly floured surface and knead for 2 to 3 minutes until smooth and elastic.
Divide the dough into two equal portions and roll each into a long rope, then press the ends together to form a bagel shape.
Bring a small pot of water to a gentle boil and carefully drop the bagels in, boiling for 30 seconds on each side to ensure a chewy texture.
Remove the bagels with a slotted spoon and place them on the prepared baking sheet.
Whisk the egg white in a small bowl and brush it over the top of each bagel, then sprinkle generously with everything bagel seasoning.
Bake for 20 to 25 minutes or until the bagels are golden brown and sound hollow when tapped.
Allow the bagels to cool for 5 minutes, then slice and spread with the remaining 2 tablespoons of Greek yogurt.
Layer the smoked salmon, fresh dill, and capers over the bagels and serve immediately.