Cook the bacon in a large skillet over medium heat until crispy, about 8-10 minutes. Transfer to a paper towel-lined plate to drain, then crumble into small pieces. Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
In a medium bowl, combine the softened cream cheese, crumbled bacon, chopped chives, garlic powder, onion powder, smoked paprika, black pepper, lemon juice, and lemon zest. Mix thoroughly until all ingredients are well incorporated and the spread is smooth and creamy.
Place the split bagel halves cut-side up on the prepared baking sheet. Generously spread the zesty bacon cream cheese mixture onto each bagel half, covering the entire surface evenly.
Bake the bagels in the preheated oven for 12-15 minutes, or until the cream cheese is slightly puffed and the edges of the bagels are lightly toasted and golden brown.
Remove the bagels from the oven and let them cool for 2-3 minutes. Garnish with additional chopped fresh chives and a sprinkle of everything bagel seasoning. Serve immediately on a flat plate or board with lemon wedges on the side.