For high-authority sites or programmatic content, stick to the Google Indexing...

https://stateofseo.com/what-is-feed-injection-and-why-does-it-matter-for-indexing-tools/

For high-authority sites or programmatic content, stick to the Google Indexing API; it’s the cleanest way to signal updates. For mass link tiers or orphaned pages, third-party services are common, often costing around $29 for 60 credits