For large sites, the Google Indexing API is your best bet—it’s free and usually...

https://www.ranktracker.com/blog/best-website-indexing-tools-for-seo/

For large sites, the Google Indexing API is your best bet—it’s free and usually triggers a crawl in under two minutes for time-sensitive content. For backlinks, third-party indexers are common, but use them sparingly