Wordpress buton to download image

Hi there

I am using Elementor to create a post loop on a page. In the loop, I am using the Ultimate Shortcode plugin to generate a QR code to that event.

This works well

I am looking to add a simple download button below the QR code that will download the QR code of that post as a png.

This will require some programming knowledge but should be an easy job for the right person.