Paste: Blend or pound chilis, shallots, garlic, ginger, cilantro, lime zest, curry powder, turmeric, and coriander into a paste (or pulse finely).
Fry paste: Heat avocado oil in a pot over medium. Cook the aromatic paste with red curry paste 2-4 minutes until fragrant.
Simmer: Stir in coconut milk and chicken broth. Add chicken, maple syrup, fish sauce, and salt. Simmer until chicken is cooked through and broth is flavorful, about 15-25 minutes.
Noodles: Cook egg noodles per package; drain.
Finish: Stir in lime juice off heat. Taste and adjust fish sauce/salt. Serve broth and chicken over noodles.