This feature is only available if the option"Make documents public" is enabled
on the space.
To get a QR code with a link to share a document with users who do not have access to the platform, go to the three dots menu in the document view. Click on the "Share document with public link" option.
Then, in the pop-up window, click on the "Public Link" tab. This tab will show you a short URL, plus the QR code and 3 buttons that allow you to download the QR, copy the QR image to the clipboard or print it: