In a small bowl, combine the softened cream cheese, sour cream, chopped dill, lemon juice, garlic powder, and black pepper. Mix until completely smooth and creamy.
Slice the cucumbers into 1/2-inch thick rounds. Lay them out on paper towels and pat the tops dry so the topping stays in place.
Spoon or pipe about a teaspoon of the cream cheese mixture onto each cucumber round, creating a small mound in the center.
Top each one with a piece of smoked salmon, folding or rolling it slightly so it sits neatly on the cream cheese. Place a few capers on top of each bite.
Sprinkle a light pinch of everything bagel seasoning over each assembled bite. Arrange them on a platter and serve immediately, or refrigerate for up to 1 hour before serving.
