Check, in order:

1. Client Config > Business: General > Allow Deliveries is Yes (for zip codes and routes) / Allow Pickups is Yes (for pickup locations) – each menu item is hidden entirely when its config is off.
2. A kitchen location is selected in the admin – these pages are per kitchen and are hidden otherwise.
3. Your role has List Zipcodes, List Transporters or List Pickup Locations. Without the matching Edit permission (Edit Zipcodes / Edit Transporters / Edit Pickup Locations) you can view the list but not open the add/edit screen – trying redirects you back to the admin dashboard.