Which Apache-modules must I enable?

The question asked is older but still relevant and this thread still comes up today in search results. Researching for my own understanding, I hope the following info updates & helps.

Referencing CloudLinux 8.4 & 7.8 with Cpanel v100.x servers and EasyApache4.

Checked Apache loaded modules with #apachectl -M and compared the enabled modules with the list and presented options in EA4.

To update the module list: :not offered in EA4 - appear to be installed / enabled by default in apachectl mod_alias; mod_authz_host; mod_dir.

:offered in EA4 and were already enabled on the two reference servers. mod_expires; mod_headers; mod_mime; mod_rewrite; mod_log_config; mod_autoindex; mod_negotiation; mod_setenvif.

In EA4 these could be useful: mod_brotli : https://docs.cpanel.net/ea4/apache/apache-module-brotli/

mod_cgi /mod_cgid / mod_fcgid : https://docs.cpanel.net/ea4/apache/apache-module-fcgid/ - lots of caveats with this one - the test servers had mod_cgi eabled on one and mod-cgid on the other - not sure how these were enabled - further review needed

mod_deflate :: Enable - relates to Optimize Website tool : html / txt file compression to enhance site speed via Apache. Ref https://docs.cpanel.net/cpanel/software/optimize-website/ - Also review Gzip compression options in WHM->Tweak Settings - check vCPU count defaults to 1 - increase to add CPU's (max = total CPU's)

mod_expires :: Enabled by default - Ref https://support.cpanel.net/hc/en-us/articles/1500008232181-How-to-set-Expires-Headers-for-Your-Site-on-cPanel

There are more but I'll review another day.

Of the list above, these are definitely not required (although they could be useful).

mod_deflate mod_expires mod_mime

Others might also be able to be omitted, depending on what you're doing and what you want to give up.

Here is the list of minimum Apache modules which is required to run WordPress websites.

mod_alias
mod_authz_host
mod_deflate
mod_dir
mod_expires
mod_headers
mod_mime
mod_rewrite
mod_log_config
mod_autoindex
mod_negotiation
mod_setenvif