Don’t worry. The problem is not in your contents’ performance. Instagram’s Graph API “only reports organic interaction metrics; interactions on ads containing a media object are not counted.”

You can learn more about Facebook’s API limitations here: https://developers.facebook.com/docs/instagram-api/guides/insights/ 

Thus we are unable to pull all the data... For example, if you shared a post and it received 100 likes. Our Reports would show 100 likes. The problem happens, when you boost the post and receive further engagement that won’t be displayed. We are deeply sorry about this limitation 😔