QR code component using CSS Flexbox

Hello Community, This is my first FrontendMentor project ,it wasn't very difficult ,as I was just practicing some flexbox techniques ,I can be unsure of the responsiveness of the component and the general sizing as it can be out of context by a couple of pixels ,finally I would ask what is considered best practice ? Using flex-direction: column; or sticking with the default and using flex-wrap: wrap; ?