There are no shopping tools built into Voice itself. You would need to create the shop in a third party tool and embed it on a page or link to it.

For a quick example I did something like this here: https://e-voice.org.uk/noticeboard/free-online-store/

I haven't researched all the different online store systems - but I expect that many of them allow you to embed the store into a standalone website, similar to how I did it on that page.

Thanks

Joe