Add a "normal" page below woocommerce shop URL?

Hi there,

one of my customers wants to build a specific URL structure that combines everything related under a common slug.
For normal pages I can achieve that by creating a page hierarchy, using parent / child relationships between pages.
But they also want pages like shipping-costs or terms, which are of course related to the shop, to be located below the shop URL.
So, if the shop URL is
the shipping costs should be located at

How would I achieve that?
The shop page is not available to be selected as parent for a page.

tethis IT, Austria