I can’t give you advice about the lower beak. Hopefully others will chime in but here are some articles about broken beaks:
https://the-chicken-chick.com/repairing-chickens-broken-beak/
https://www.petmd.com/bird/conditions/traumatic/broken-and-injured-beak-birds
https://the-chicken-chick.com/repairing-chickens-broken-beak/
https://www.petmd.com/bird/conditions/traumatic/broken-and-injured-beak-birds