Configuring Brotli from WHM/cPanel/EasyApache
It looks like it's pretty simple to configure Brotli with CPanel/WHM. I found some good information about this right through CPanel's site, so I wanted to give some links.
This first one is a discussion about configuring Brotli per account. From the conversation, it appears that Brotli was installed via EasyApache:
Which took me to this discussion on using EasyApache for Brotli. It gives links to documentation surrounding the Brotli/EasyApache Support: