In the next video below, you can see a guide to know how to select your products one-by-one when the supplier requires approval:
Do not you know what approval means? Then check this article:
https://help.syncee.io/en/articles/4142044-what-is-approval-needed-in-the-marketplace
And when their products are free to use:
Please contact our free support if you have any questions regarding the steps.