Sitemap errors and warnings found

All the URLs in your Sitemap are marked as having dynamic content.
All the URLs in your Sitemap are marked as having dynamic content. Because dynamic content is difficult for search engines to crawl and index, this may impact your site’s performance in search results. Check your Sitemap to make sure your site information is correct.

If you set the frequency of “daily” but the fact you updated monthly, it can also be affected warning. So the best way is to create a “frequency sitemap” exactly the same as the “frequency of updates” your website.