Snippet to add images to Yoast sitemap from Impreza Wordpress theme

snippet.php

<?php
/* Add impreza images to Yoast sitemap, since Yoast doesn't read impreza's Page
 * Builder code - borrowed from (https://github.com/Yoast/wordpress-seo/issues/4808) */

function impreza_filter_wpseo_sitemap_urlimages($images, $post_id)
{
  $post = get_post($post_id);

  if (is_object($post)) {
    $content = $post->post_content;

    # Parse impreza Image modules
    preg_match_all("/image=\"(\d+)\"/", $content, $impreza_images);
	
    if(count($impreza_images) < 2){
      return $images;
    }

    foreach ($impreza_images[1] as $impreza_image_id)
    {
      $attachment = wp_prepare_attachment_for_js( $impreza_image_id );
      $images[] = array(
        'src' => $attachment["url"],
        'title' => $attachment["title"],
        'alt' => $attachment["description"]
      );
    }

  }

  return $images;
}
add_filter('wpseo_sitemap_urlimages', 'impreza_filter_wpseo_sitemap_urlimages', 10, 2);
?>

yoast sitemap generation and wpbakery broke again resulting in thin pages and seo penalty.
I'm trying to implement this snippet to manually add images for specific posts/pages/portfolios that contain images within wpbakery pagebuilder blocks.

Can you let me know how and where to put your snippet function to make it work? Do I have to create a function snippet like the above for each and every page/post/portfolio I'd like to manually inject into the sitemap, or can I just put every image and post in this function?
Where in this function do I have to put the page/post/image id to make it work?
Do I just replace url in "url" with my url?

        'src' => $attachment["url"],
        'title' => $attachment["title"],
        'alt' => $attachment["description"]

Or does this function work with ALL images on every post/page/portfolio out of the box?
Sorry for my ignorance.