Here are some tips to optimize your XML sitemaps for different types of content:

1. Follow the sitemaps.org protocol for search engines to understand them.
2. Structure XML sitemaps by site section.
3. Only include your ‘money pages’.
4. Avoid non-200 HTTP status codes.
5. Avoid noindexed URLs.
6. Avoid URLs that canonicalise to another URL.

You can use tools and plugins to generate your sitemap automatically². An optimized XML sitemap is one of those signals that can lead to faster indexing and higher rankings⁴.

Source: 
(1) How to Optimize XML Sitemaps: 13 SEO Best Practices - Search Engine Journal. https://www.searchenginejournal.com/xml-sitemap-best-practices/237649/
(2) How to Optimize your XML Sitemap for Maximum SEO - Reliablesoft. https://www.reliablesoft.net/how-to-optimize-your-xml-sitemap-for-maximum-seo/
(3) How to Optimize Your XML Sitemap to Improve Your SEO - Oncrawl. https://www.oncrawl.com/oncrawl-seo-thoughts/optimize-xml-sitemap/
(4) How to Use XML Sitemaps to Boost SEO - Search Engine Journal. https://www.searchenginejournal.com/technical-seo/xml-sitemaps/