The reactions you see in your ad breakdown are likely interactions generated from specific placements, such as ads shown in the Facebook News Feed, Facebook Audience Network, Instagram Stories, or other sponsored placements.
However, these reactions are not always publicly visible on the original post from your Instagram or Facebook account. They remain linked to the sponsored versions of your post, which are displayed to different audiences, sometimes in different formats (e.g., an ad may appear differently in the News Feed than in Stories).