The Docker documentation page contains some helpful information about the new FTLCONF env vars and configuration, but it doesn't link out to anywhere that lists all the configuration options.

I think this section:

As with the recommended examples above for the web password and DNS upstreams, the syntax is FTLCONF_[section_][setting]

Could be augmented to something like:

As with the recommended examples above for the web password and DNS upstreams, the syntax is FTLCONF_[section_][setting]. You can find a complete list of all FTL configuration options [[here]].

Similarly, you can find your way to https://github.com/pi-hole/docker-pi-hole?tab=readme-ov-file#optional-variables which suggests reading the API Documentation page to find this list, but that page doesn't obviously link out to FTL configuration options, either. It does call out //pi.hole/api/docs at the top, but this assumes you already have a working pihole instance. It's not until you get through that paragraph that you find the link to the hosted docs.

In the end, it makes it quite difficult to find your way to all the configuration options.