I have not. The implementation isn’t as much as my concern as the logic, however. I can make the call in a router handler, server action, etc. My issue lies mostly within whether we have access to the functionality used to generate the sitemap that NextJS uses internally.
I wanted to avoid reinventing the wheel so to speak.
If not, then I will just make a service to override the sitemap generated by NextJS and call that via cron & after certain events are fired that would call for it to be refreshed.