Supports posts and pages.
There will be an admin page to activate or deactivate this meta-box feature for the post-types you like. As for now you can use the
filter qrcode_link_post_types to return a string-array of post-types you want this feature for.
Example:
add_filter(‘qrcode_link_post_types’, ‘qrcode_post_types’);
function qrcode_post_types($post_types){
return [‘post’, ‘page’, ‘product’];
}