How to add continue shopping button from 404 page to other pages?

Hi there,
does anyone of you know hot it is possible to add the “continue shopping” button displayed at the 404 page of the debut theme (in our case https://shop.yellowtec.com/404) to any other page, e.g. https://shop.yellowtec.com/pages/b-line instead of a “simple text link”?

I’d love to get some advice from you as the support chat couldn’t help me out with this.

What is the best workflow? Where can I find and access the respective code of the button? Or is there even a shortcut that makes it easier to add the button? It would be awesome if you could help me out with some advice.

Best, Kathrin