Preheat oven to 400°F and line a baking sheet with parchment paper.
Toss cauliflower florets with almond flour, half the garlic powder, onion powder, salt, and pepper until evenly coated.
Spread cauliflower on the baking sheet, drizzle with half the avocado oil, and roast for 20-25 minutes until golden and tender.
While cauliflower roasts, season chicken breast with remaining salt and pepper, then grill in a pan with the rest of the avocado oil over medium heat until cooked through.
In a small bowl, whisk together Greek yogurt, dried dill, dried chives, lemon juice, and remaining garlic powder to create the ranch dip.
Slice the grilled chicken into bite-sized pieces.
Toss the roasted cauliflower and chicken pieces in buffalo hot sauce until fully coated.
Serve the buffalo chicken and cauliflower immediately with the chilled ranch dip on the side.