Place the chicken thighs in the bottom of the slow cooker. Add the diced onion, minced garlic, sliced carrots, chopped zucchini, and chopped red bell pepper on top.
Pour the drained chickpeas over the vegetables. Sprinkle the cumin, cinnamon, turmeric, paprika, salt, and black pepper evenly across everything.
Pour the chicken broth over the ingredients. Stir gently to distribute the spices without moving the chicken.
Cover and cook on low for 6 hours. The chicken should be tender enough to shred easily with two forks.
Shred the chicken directly in the slow cooker using two forks. Stir in the fresh lemon juice.
Ladle the stew into bowls. Top each serving with chopped cilantro and serve with lemon wedges on the side.