Preheat your oven to 400°F and line a baking sheet with parchment paper.
Slice the jalapeño peppers in half lengthwise and use a spoon to carefully remove the seeds and white membranes.
In a medium bowl, combine the shredded cooked chicken breast, cream cheese, shredded cheddar, half of the garlic powder, and half of the onion powder.
Fill each jalapeño half generously with the chicken and cheese mixture and place them on the prepared baking sheet.
Bake for 15 to 18 minutes until the peppers are tender and the cheese filling is golden and bubbly.
While the poppers roast, whisk together the Greek yogurt, chipotle in adobo, lime juice, remaining garlic powder, remaining onion powder, sea salt, and black pepper in a small bowl.
Remove the poppers from the oven, garnish with fresh cilantro, and serve immediately with the chipotle ranch dip.