Craft CMS: Getting entries grouped by category in order of the category type drag & drop order.

craft-cms-entries-by-category-group.twig

{# Get the categories related to my "entrySection" entries in structure order #}
{% set entries = craft.entries.section('entrySection') %}
{% set relatedCats = craft.categories.relatedTo(entries) %}

{# Loop the categories #}
{% for category in relatedCats %}
  
  {{ category.title }}
  
  {# Get and loop through entries related to this cat #}
  {% set relatedEntries = craft.entries.relatedTo(category) %}
  {% for entry in relatedEntries %}
    
    {{ entry.title }}

  {% endfor %}

{% endfor %}