To relist items on eBay,

1. Go to your Magento 2 admin panel.
2. Click on eBay present on the left navigation bar.
   
3. Click on Product Manager.
   The eBay Product Listing page appears as shown in the following figure:
   
4. Select the products that you want to relist on eBay by checking the corresponding boxes.
5. Click the Arrow button next to the Actions list, and then click Relist Item(s).
   
   
6. A Confirmation dialog box appears as shown in the following figure. Click OK. 
   The page appears as shown in the following figure with the status:
   

The selected products will be relisted on eBay.