By default, Magento QR Code functionality is not provided in the invoice PDF. To Create QR code of invoice ID and add it to the Magento 2 invoice PDF, you need to install the QRcode library in your Magento: “composer require aferrandini/phpqrcode”.
Attachment 16115
Let’s learn How to Create QR Code of invoice ID and add it to Magento 2 Invoice PDF
