How to check if a multiple paragraph is empty

example.twig

{% set preprinted_supplies = node.field_issue_calendar.value %}
{% set preprinted_supplies_not_empty = [] %}
{% for item in preprinted_supplies %}
  {% set psp = drupal_field('field_preprinted_supplied_pieces', 'paragraph', item.target_id) %}
  {% if psp['#title'] is not null %}
    {% set preprinted_supplies_not_empty = preprinted_supplies_not_empty|merge(['true']) %}
  {% endif %}
{% endfor %}

{% if preprinted_supplies_not_empty|length > 0 %}
  <th scope="col">PREPRINTED SUPPLIED PIECES DUE</th>
{% endif %}