{% for item in node.field_tab_content %}

       <span>{{ node.field_tab_content[loop.index0].entity.field_title.value | raw }}</span>
       <span>{{ node.field_tab_content[loop.index0].entity.field_content_area.value | raw }}</span>


{% endfor %}

Tab Title 1
Tab Content 2
Tab Title 2
Tab Content 3
Tab Title 4
Tab Content 4