@marceloborges I wrote up a pretty good community post on how to do this a couple months ago. Here is a link to it: https://connective.celigo.com/t/one-to-many-using-non-standard-api-response-pattern-on-a-csv/384.
On that article, there is a flow zip you can download and then upload into your environment. Once you upload it, you'll need to change the reportType parameter in the export relative URIs and you'll need to swap out NetSuite for Microsoft BC.