@jwbdv Thanks for your reply and for proving the screenshot.
Whereas the XML Sitemap should dynamically update after any modification to it, if the site or server is caching the sitemap this can cause it to not update right away. We also have additional information on this at the following link: Sitemap does not update.
If you are not seeing the sitemap as updated, we would recommend checking your caching settings and to ensure that the sitemap is being excluded from the cache.
If the sitemap is being cached by a plugin we have directions on how to add an exclusion for the sitemap files to your cache plugin at the following link: How do I prevent sitemaps from being cached?
If you are still experiencing an issue with the sitemap not updating after checking your caching settings, you can also force a cache reset by temporarily disabling the sitemap feature, and then re-enabling it. To do so, please refer to the guide on how to enable and disable XML Sitemaps located here: How to enable and view the XML sitemap in Yoast SEO.