Why my Canvas Background Image doesnt Show the QR after response

[sasori_ltd (Erish Caguin)]

Why my Canvas Background Image doesnt Show the QR after response?

But i can download it and share it after response
But the Image of QR doesnt show up

The size of canvas is 126px x 126 px

[Avijit (Avijit Das)]

Don’t use canvas. Use images

[Earn_Money_online (AiaStore)]

If we set the bg image of canvas as a QR code then unable to set the margin of that QR