LOL. Those XML URLs are forever.
> Going on a small tangent, if you look at the xmlns attribute in the sitemap snippet, you'll see that the URI is on HTTP, and not on HTTPS. This is working as intended: it's a reference for parsers about the elements in the XML. Please don't file more documentation feedback about this.
https://developers.google.com/search/blog/2023/06/sitemaps-lastmod-ping