For high-volume sites, the Google Indexing API is the gold standard for rapid...

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

For high-volume sites, the Google Indexing API is the gold standard for rapid updates. For smaller link campaigns, third-party services like IndexInject—which offers plans around $29 for 60 credits—can help get your backlinks noticed within two minutes