Accounting wants to work with a portion of the Parquet database. Your options are: give them data in CSV/Excel formats, or hire a dev to work for accounting full time and still have them constantly complaining about having to wait on the dev to get them the data they need.

The programmers, data scientists, and other technical fields should never process data in Excel, but you can’t expect that of the whole organization, so exporting to it is important. At this point, I’d recommend XSLX as the export format because it’s harder to mess up the encoding, but libraries exist for CSV and others as well.