Guys, how to optimize sitemap in 2024

My website has different URLs for the mobile and desktop versions. How should I correctly set up the sitemap? Currently, I'm using separate sitemaps for the mobile and desktop versions, as that's what previous tutorials suggested. However, I noticed that https://developers.google.com/search/docs/crawling-indexing/sitemaps/build-sitemap recommends providing the same sitemap.

So which one is better?

For sites with different mobile and desktop URLs, it’s best to use one sitemap that includes all versions, and use the canonical tag to indicate the preferred version.