Pat chicken thighs dry. In a bowl, mix 3 Tbsp peanut butter, 1 tsp ginger, 2 Tbsp soy sauce, and 2 Tbsp garlic. Add the chicken and coat well. Cover and refrigerate for at least 1 hour.
In a mixing bowl, combine shredded cabbage, carrots, green onion, 1 Tbsp peanut butter, lime juice, rice vinegar, and salt. Toss until fully coated. Set aside or chill until ready to use.
In a small bowl, whisk together 2 Tbsp peanut butter, 1 tsp soy sauce, maple syrup, ginger, and water until smooth. Add more water as needed for drizzling consistency.
Heat a skillet over medium heat. Remove chicken from marinade and cook for 5–7 minutes per side until golden and fully cooked (internal temp of 165°F). Let rest 5 minutes, then shred into thin strips.
Warm tortillas in a dry skillet or microwave. To each tortilla, add a scoop of slaw, shredded chicken, and a drizzle of peanut sauce. Top generously with chopped peanuts and extra green onions for garnish.