I have required "updated" permissions as per this document - https://developers.facebook.com/docs/instagram-platform/instagram-graph-api/reference/ig-user/insights#requirements

"instagram_business_basic" and "instagram_business_manage_insights"

But I am still unable to get insights for the testing Instagram account. - Instagram account is linked to Facebook account - Have added instagram account as tester in app

Any help would be much appreciated.