Just a non-educated guess, it was a QR code in reference to the pandemic at the time, and since Naomi's a law and order type of chick, who knows.
I just know that while she isn't the favorite of a lot of people, I can't wait to see more from her, good thing digi worked on her model (that jaw at some point, damn...), cause like most, she's scarred by something, her little backstory was telling, but I want to learn more, way more. And, as the probable tsundere of the game, she'll either be a beast in bed, or she will melt in MCs arms.