Preheat the oven to 425°F.
In a medium bowl, whisk together the lemon juice, apple cider vinegar, and honey until smooth. Add the sliced red onion, toss to coat, and set aside.
Heat the oil in a large oven-safe skillet over medium heat. While the pan heats, pat the chicken dry and season generously with salt and pepper.
Sear the chicken thighs for about 3 minutes per side, until lightly browned. Transfer to a plate.
Lower the heat to medium-low. Add the garlic, cumin, smoked paprika, and harissa to the skillet and cook for about 1 minute, stirring until fragrant.
Pour in the chicken broth, scraping up any browned bits from the bottom of the pan. Add the chickpeas and stir to combine.
Nestle the chicken back into the skillet, spooning sauce over the top so the chicken is mostly submerged.
Transfer the skillet to the oven and roast for 20–25 minutes, until the sauce is bubbling and the chicken reaches 165°F.
Just before serving, toss the mint and parsley into the red onion mixture. Spoon the onion-herb topping over the chicken and chickpeas and serve immediately.