I have a 4GB Raspberry Pi 4 and I have mounted a LEMP server, with a domain in Namecheap, following this guide: https://www.techcoil.com/blog/how-to-host-a-wordpress-website-on-a-raspberry-pi-with-raspbian-buster-lite-and-nginx/
Right now, we have a clean WordPress installation without installing additional plugins or themes.
The error we are having is that when trying to access the web, sometimes it gives a Timeout error, and at other times it works fine. It usually happens on the first connection, and once the main page loads, you can move through the menus and load quickly.
For testing, one way to check is with PageSpeed Insights, and it usually gives “FAILED_DOCUMENT_REQUEST” error or takes a long time to load “Speed Index”.
The website is https://dualbix.com
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