I'm wondering, no one has an answer. Using QR Code instead of Barcode should be nothing special any more these days. 

Hi,

Unfortunately, there is no built-in feature in Odoo that allows you to easily change all printed barcodes to QR code format. However, you can achieve this by customizing it. You would need to create a custom report template for the labels you want to print, such as product labels. In this custom report template, you can replace the barcode field with a QR code field.

You can use the blog How to Generate a QR Code in Odoo 17 ERP to generate a QR code.

Hope it helps.