Can I get multiple thumbnails for multiple links referenced in a Facebook post? Usually, the thumbnail is generated for the first link, but not for the second onwards.
You can only get the one thumbnail per post. However, you can post the second link as a comment, and that will generate a preview with a thumbnail in the comment.
You'll have less control over the thumbnail in the comment. If you have multiple images on the webpage, Facebook will choose which one to display (I'm not certain how it decides) rather than letting you scroll through the images to choose one yourself.