If you create a shopping page in the shopping experiences, e.g. for shipping costs or payment methods, and insert the content there, the content is displayed in the modal window.

If you now create a corresponding category for the store footer, you can assign the layout, but the content is not displayed when you click on the link in the footer.

Unfortunately, there is obviously no variable available yet that can be used to achieve the data mapping.
Just like the variable "category.description", a new variable such as "shopping.description" is therefore required.

If there is another way that I have not found, please let me know.

As it is now, you have to create the content in the experience world for the modal window and also for the footer link in the layout section - standard. The content must therefore be maintained twice.