Add the diced onion, carrots, zucchinis, red bell pepper, sweet potatoes, and minced garlic to the slow cooker.
Stir in the drained chickpeas, diced tomatoes, vegetable broth, chopped apricots, olive oil, cumin, coriander, cinnamon, smoked paprika, ginger, and turmeric.
Season with salt and black pepper, then mix everything until the spices coat the vegetables and chickpeas evenly.
Cover and cook on low for 6 to 8 hours or on high for 3 to 4 hours, until the sweet potatoes and carrots are tender.
Taste the tagine and adjust salt or pepper if needed.
Ladle into bowls and top with fresh cilantro. Serve with lemon wedges on the side.