Tecadmin published a tutorial about setting up Nginx with PHP-FPM on Ubuntu 20.04.

How to Setup Nginx with PHP-FPM on Ubuntu 20.04

The PHP FPM (FastCGI Process Manager) is used for deploying PHP based websites over Nginx web server. FPM is a process manager to manage the FastCGI SAPI (Server API) in PHP. This tutorial will help you to install and configure Nginx with PHP-FPM on Ubuntu 20.04 system. 

How to Setup Nginx with PHP-FPM on Ubuntu 20.04