Get Media Insights Endpoint: https://graph.facebook.com/v5.0/{ig-media-id}/insights?metric=engagement,impressions,reach,saved,video_views&access_token={access-token}
Response
Get User Insights Endpoint: https://graph.facebook.com/v5.0/{ig-user-id}/insights?metric=follower_count,impressions,profile_views,reach&period=day&access_token={access-token}