Hi
I have a recommendation for a Joomla cache plg that working very well speeding up your site and JBD too.
https://www.web-expert.gr/en/joomla-extensions/item/127-nginx-server-cache-joomla
Pls test it and share if you got happy to use it.
Its free to dl and use.
I have had many issues with Nginx especially because of its Incompatibility with .htaccess. The cache does not clear across all CDN servers at the same time if you have a website that is updated with new content all the time and visitors would see old versions of pages.
Instead, I use LiteSpeed Server, and the performance so 4x faster than Nginx because off ESI (Edge Side Includes): LiteSpeed supports ESI, which allows you to designate parts of your dynamic web page as non-cacheable or cacheable for different lengths of time. While NGINX can be made to support ESI, it doesn't have native support and requires a more complex configuration.