Having issues with Google not seeing new pages after sitemap regeneration and cache invalidation?

Hey everyone, I'm pretty new to the whole sitemap management game and I'm really struggling with a problem where new pages on my SaaS aren't showing up in Google's index, even after I've updated my XML sitemap and tried to invalidate the cache. It seems like Google just isn't picking up the changes, leading to significant indexing issues. Is there some common pitfall I'm missing, or a specific step to ensure Google actually sees the updated sitemap after regeneration? Anyone faced this before?