ありがとございます

こんにちは

$revisions = wp_get_post_revisions($post_id);
    foreach ($revisions as $revision) {
        $rev_args = array(
            'post_title'   => $revision->post_title,
            'post_content' => $revision->post_content,
            'post_status'  => 'inherit',
            'post_type'    => 'revision',
            'post_parent'  => $new_post_id,
        );
        wp_insert_post($rev_args);
    }