Accordion Widget as shortcode

I am trying to include the accordion widget in a page with a php template.
The site basically includes all widgets over the pageBuilder interface, but in one spot, I’d like to use the accordion in a php template.

For that I created the widget code in the page builder on a sample page, switched to the html editor, copied the code and inserted in in the php template surrounded by the do_shortcode() php command.
The output gives no php error, but the html neither shows the accordion itself…

Is there a way to manually use the accordion widget without using the pagebuilder? I would hate to rely on another plugin because of the unification of the layout…

PHP File is like:

echo $result="blabla".do_shortcode("[siteorigin_widget class='SiteOrigin_Widget_Accordion_Widget']<input type='hidden' value='{"instance":{"title":"title","panels":[{"title":"Panel1","content_text":"content1</p>n","content_text_selected_editor":"tinymce","initial_state":"closed","autop":false},{"title":"Title 2","content_text":"Content 2</p>n","content_text_selected_editor":"tinymce","initial_state":"closed","autop":false}],"design":{"heading":{"background_color":"#828282","background_hover_color":"#8c8c8c","title_color":"#fff","title_hover_color":false,"border_color":false,"border_hover_color":false,"border_width":false,"border_width_unit":"px","so_field_container_state":"closed"},"panels":{"background_color":"#f9f9f9","font_color":false,"border_color":false,"border_width":false,"border_width_unit":"px","margin_bottom":"10px","margin_bottom_unit":"px","so_field_container_state":"closed"},"so_field_container_state":"closed"},"_sow_form_id":"491160991632b1b9c67bd3786650903","_sow_form_timestamp":"1663769529659","so_sidebar_emulator_id":"sow-accordion-210001","option_name":"widget_sow-accordion"},"args":{"before_widget":"<div id="panel-2-1-0-0" class="so-panel widget widget_sow-accordion panel-first-child panel-last-child" data-index="1" data-style="{&quot;background_image_attachment&quot;:false,&quot;background_display&quot;:&quot;tile&quot;}" >","after_widget":"</div>","before_title":"<h3 class="widget-title">","after_title":"</h3>","widget_id":"widget-1-0-0"}}' />[/siteorigin_widget]")." blabla"

HTML Output is:

<div class="so-widget-sow-accordion so-widget-sow-accordion-default-0cbe2f692174"><div>
	<div class="sow-accordion">
		</div>
</div>
</div>