"The creation of a barcode/QR code image"

concerning this, this feature was removed in SharePoint Server 2013.

If you are using a Classic Team site, then you can enable barcodes on List Items.

If you are using a Modern Team Site or are using SharePoint Server 2013+, then you dont have access to barcodes anymore 😞

 

https://support.office.com/en-us/article/discontinued-features-and-modified-functionality-in-microsoft-sharepoint-2013-bbbb0815-2538-4f1d-b647-1f7f6d508c93#__toc382936210