Why don't you just do it manually......Copy the listing.......Publish! Mine come up instantly. Maybe I am missing something here?
Go to your shop page.....click "Edit About Page"......once there...on the left of the page click on "Listings"......find your listing in one of the tabs at the top (Active,Draft,Sold Out, Expired, or Featured)......click on the title of it and it will open to an "EDIT" page of it....make changes to it or do nothing....just "PUBLISH" it and you should now see it in your shop.