Default WordPress installations do not support featured images in their feeds. Below explains using one of the popular WP plugins to enable this feature on your WordPress website.
1. Navigate to 'Plugins' in WP-admin and click on 'Add new.'
2. Search for 'RSS Featured Image.'
3. Click on 'Install now' on a first plugin By Jordy Meow.
4. Click on 'Activate.'
5. You're ready to use your feed in Zappter with images, no additional setup on WordPress site is required. Simply use https://yourdomain.com/?feed=rss as your feed address in Zappter setup as explained in the previous section, 'Setting Up.'
Enter the above RSS feed URL in Zappter. For more information, read the previous section.