So for some odd reason, if I create a new project in Lightburn and then import the QR code, it looks fine (using a clean SVG, not the one with duplicate lines). I can invert it by ungrouping the outline and converting that to a hidden line.
Unfortunately after all that work, I determined that a QR code won’t work for this particular application I’m working on. It’s a business card and I was hoping to make it easy to scan and add vcard details to your phone. The cards I’m using are anodized aluminum which look great for everything else (https://www.instagram.com/p/By3uyt2F6HK/) , but they are too reflective to use for QR codes.
Thank you for the help everyone!