Made Description into Collapsible Row but Name is empty

Store Design
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1

Okay so I cant use metafileds for my description because of different reasons, so I used this Code to make a collapsible row out of my description:

{%- when 'description' -%}
  {%- if product.description != blank -%}
    
      
    

{%- endif -%}

That worked fine, but there is no heading for the collapsible row.
I want to rename the collapsible row “description” but I dont know how to do that.

It looks like this:

Screenshot 2023-09-20 141415.jpg

Can somebody help me out with this?

Kind regards