To solve an issue with Google Search Console, I had to force my site cache to be no-cache.

Since I added the export const dynamic = 'force-dynamic' directive in my layout.tsx, when the next-sitemap builds it generates an empty sitemap.xml:

<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
</sitemapindex>

Any idea what might be causing this?

Here is the sitemap.xml when it is generated properly:

<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap><loc>https://XXX.com/sitemap-0.xml</loc></sitemap>
</sitemapindex>