2D barcode "QR Code" (aka "matrix barcode") is not supported in Oracle Reports yet out of the box.
An Enhancement request is logged in order to have the possibility to use 2D barcode with Oracle Reports.
Please see Bug 8401811 ENH: NEED ABILITY TO DISPLAY AND PRINT TWO-DIMENSIONAL (2D) BARCODES
Hope this helps,
If someone's answer is helpful or correct please mark it accordingly.
Thanks for your reply. It's good to know a request has been made.