How to get field label from a field machine name
The label is not stored in the field storage configuration. You'll find the label in the bundle specific field definition:

$definitions = \Drupal::service('entity_field.manager')-&gt;getFieldDefinitions('node', 'page');
foreach (array_keys($definitions) as $key) {
  // get label for field machine name $key:
  $label = $definitions[$key]-&gt;getLabel();
}


Reference: EntityFieldManager::getFieldDefinitions