Laravel SEO Sitemap Challenge

Our Laravel application has a rapidly changing content base, making traditional cached XML sitemaps quickly outdated and resource-intensive to rebuild. The core technical block is achieving real-time, granular updates to lastmod and changefreq attributes within a dynamic XML sitemap without a full regeneration on every content modification, particularly as our dataset scales, to maximize Laravel SEO efficacy. What are the most robust and performant strategies for truly auto-updating dynamic sitemaps in Laravel without incurring significant server load? Anyone faced this before?