我使用这个简单的查询实现了它

<?php

$chunks=array_chunk(
  get_posts([
    \'fields\'=>\'ids\',
    \'posts_per_page\'=>-1,
    \'post_type\'=>[$post->post_type],
    \'orderby\'=>\'ID\',
    \'order\'=>\'ASC\'
  ]),
  wp_sitemaps_get_max_urls(\'post\')
);

foreach($chunks as $key => $chunk) {
  if(!in_array($post->ID,$chunk)) continue;

  var_dump(get_sitemap_url(\'posts\',$post->post_type,$key + 1));
  break;
}