Hi,

The Customer and Product QR Code Generator allows users to scan QR codes simply and easily from within your browser. This module helps to set up a unique QR code to both your products and customers.

In Odoo, the QR code plays a vital role in enhancing business operations.
They can enhance the efficiency and accuracy of various business processes in Odoo by providing quick access to relevant information and facilitating seamless interactions between different stakeholders.

QR codes can be used to store information, such as the name, description, price, and availability of products. Initiating the payments in invoices and bills to track the inventory movements such as picking, etc

Try this app:
https://apps.odoo.com/apps/modules/16.0/customer_product_qrcode/

Hope it helps