Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
In a large mixing bowl, toss the cauliflower florets with avocado oil, sea salt, black pepper, and garlic powder until every piece is evenly coated.
In a separate bowl, lightly season the ground chicken with a pinch of salt and form it into small, bite-sized nuggets roughly the same size as the cauliflower florets.
Spread the cauliflower and chicken bites across the prepared baking sheet in a single layer, ensuring they aren't crowded so they roast rather than steam.
Roast for 20 to 25 minutes, flipping halfway through, until the chicken is cooked through and the cauliflower edges are golden and tender.
While the bites roast, whisk together the Greek yogurt, dried dill, onion powder, chopped fresh chives, and lemon juice in a small bowl to create the ranch dip.
Remove the tray from the oven, transfer the roasted chicken and cauliflower to a bowl, and toss with the buffalo sauce until thoroughly glazed.
Serve the warm buffalo bites immediately with the chilled herb ranch on the side for dipping.