I am using generateSitemaps() and sitemaps() in a sitemap.js file to generate sitemaps for my website. It seems like this is only generating the different sitemaps but no actual index-sitemap. When adding these to google search console, do I have to manually add all of the individual sitemaps (https://example.com/records/sitemap/0.xml, ...1.xml, ...2.xml etc.) or am i missing something?