List your indexable pages
Publish an XML sitemap containing canonical, public URLs you want indexed. The Astro sitemap integration can generate URLs known at build time. If your EmDash routes are dynamic or content changes outside builds, generate the sitemap from your published content or supply those URLs explicitly.
Check and submit
Exclude private, noindex and redirected URLs. Open the sitemap after deployment, reference its absolute URL in robots.txt and submit it to Search Console. A sitemap helps discovery but does not guarantee indexing.