Our plugin primarily adds images to the feed, and then adds inline CSS to style it, but the CSS may or may not be used, depending on the RSS reader or service. So, some may require additional or custom CSS to affect the images. It also optionally adds HTML to the IMG code, to link to the post, but again, if it’s in the raw feed, it may or may not work depending on the RSS service.
If you are not seeing images in the raw feed, or the link or styling, then either the feed is cached, and the cache needs to be cleared, or something else is also adding images to the feed but is not including the styling or link, and our plugin may not be working or in conflict with whatever else is also adding images. Most often, it is another plugin like Feedzy or Rank Math, and options need to be set to disable that, or it’s in the theme itself, often in custom code, and it is affecting the feed or blocking or overwriting what we add to the feed.
There’s more troubleshooting tips here: https://support.5starplugins.com/category/160-troubleshooting-rss-images
Specifically, look at this one: https://support.5starplugins.com/article/167-check-for-conflicting-rss-plugins-using-this-shortcut