Displaying all values of a List (text) field, whether checked or unchecked
You can easily generate a field formatter to output what you need in drupal 8 (generate field formatter => drupal gpff with drupal console) and get the result into a view.

Getting the field definition will allow you to get all possibles values (selected or not) for your list and display items as check or not considering the current node value.

$defs = \Drupal::service('entity_field.manager')-&gt;getFieldDefinitions('{ENTITY_TYPE}', '{BUNDLE}');
$field_definition = $defs['{FIELD_NAME}'];


Your custom formatter will be available in views (and everywhere it is usable, node display etc.).