WordPress Version: 6.2
/**
* Gets the permalink for a post on another blog.
*
* @since MU (3.0.0) 1.0
*
* @param int $blog_id ID of the source blog.
* @param int $post_id ID of the desired post.
* @return string The post's permalink.
*/
function get_blog_permalink($blog_id, $post_id)
{
switch_to_blog($blog_id);
$link = get_permalink($post_id);
restore_current_blog();
return $link;
}