The product posts don't appear on my site

If you have selected to "schedule X posts per week", then only one product will be added to your site immediately. The others will be posted at later dates, depending on the scheduling option you selected.

If you want to add all the posts immediately, please select "Publish all posts immediately."

You can see all your posts, scheduled and published whn you click on "Posts" on the left-hand-side menu in your site's dashboard.