https://developers.google.com/search/docs/crawling-indexing/sitemaps/large-sitemaps?visit_id=637124512275025756-447112101&rd=2
Manage Your Sitemaps With Sitemap Index Files | Google Search Central | Documentation | Google for...
You can submit multiple sitemaps at once with a sitemaps index file. Learn how to manage large sitemaps.
sitemap index filesgoogle search centralmanage yourdocumentation forsitemaps