using associative array for table/form schema array

// default form schema
function defaultRegistrationForm(){
  return [
    'name' => TextInput::make('name'),
    'email' => TextInput::make('email'),
  ];
}

function getRegistrationFormSchema(){
  // handle form schema customization
}

// form
$form->schema($this->getRegistrationFormSchema())

  RegistrationForm::add(fn() => ['mobile' => TextInput::make('mobile'));
  RegistrationForm::before('name', ['salutation => ...]);