You can either 

• look up product in 'pending approval' status from dashboard; OR
• from product list, filter product in 'pending approval' status

To look up from dashboard

1. From left navigation, choose 'Dashboard'

2. click on the card 'Pending Approval'

3. Click 'Edit' button (the pen) of the order 

4. Review the content

5. Once the review is completed, user could decide to approve or reject the product data, either from the content header

Or at the end of the page.

You may want to leave a comment if you reject a content.