Magic Leap OS 1.2.0 adds a QR Reader app, accessible from the app launcher, or via a shortcut in the built-in browser.
Launching the app will show a viewfinder interface similar to the capture feature. If you're running Magic Leap OS 1.3.0-dev1 or later and you have dimming enabled on your device, it will be disabled while using the QR Reader. To start the process, look at the QR code. When the QR code is in the area of the viewfinder, it will be highlighted yellow as the code is read.
Upon successfully reading the code, a pop-up will appear asking if you want to open the link in the browser.