I went to the support on bloglovin’ and this is what it said about images:
Why don’t images from my blog show up in posts on Bloglovin?
Bloglovin is looking for images associated with the posts in your blog’s RSS.
If your images are not included in the RSS, they will have to be added to this feed in order for Bloglovin to be able to find and display them. Please contact whoever is responsible for the technical issues of your blog for further assistance.
If the images are already included in the RSS but still not showing up on Bloglovin, they might be in a file format we don’t recognize, yet. Please make sure the images are in the format jpeg.
Tom, do you know if the images would be included in the RSS and if they are, are then in jpeg format?