Add IMG to Allowed Description Tags

betrs-add-img-tag-desc.php

/*
 * Adds the <img> tag to allowed tags in the Description field.
 *
 * Requires Table Rate Shipping for WooCommerce 4.2+
 */
add_filter( 'betrs_desc_allowed_tags', 'add_new_allowed_tags_betrs', 10, 1 );
function add_new_allowed_tags_betrs( $allowedtags ) {

    $allowedtags['img'] = array(
      'alt'     => true,
      'align'   => true,
      'border'  => true,
      'height'  => true,
      'src'     => true,
      'width'   => true,
      'class'   => true,
      'id'      => true,
      'style'   => true,
      'title'   => true,
    );
   
    return $allowedtags;
}

Does this still work? Is it for displaying the likes of a courier logo beside the Shipping description at checkout? I've added to functions.php and tried to embed an image after the description text but the image doesn't appear and the HTML is stripped on saving