I’m currently facing a similar issue. I posted a Reel on Instagram, but it’s not displaying correctly in the Elfsight widget. The widget shows the caption, but instead of showing the Reel, it only shows a generic link to instagram.com—not the actual post link.
Hi there, @PRO_DATA 
I’ve checked your widget and found that the post with missing image previews is Reels that contains copyrighted music.
Unfortunately, Instagra, can’t provide certain data for Business Account types of connection if it concerns copyright. I’m truly sorry about this inconvenience 
In this case, the only option to display this post with the thumbnail is to use the Public (Account and Hashtag) connection, which is available in our Instagram Feed.
Please let me know if this explains things or if you have any questions left.
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