Two themes two config files?

Greetings,

I have my main theme which has a config.toml file.
Now I am developing some additional features and I am associating those features together as a second theme, which I call from my first theme’s config file. Now, I am in the situation where some of the features in my second theme need config settings. Can I create a second config.toml in the second theme’s structure and have those features access key/value pairs from that second config file, or MUST all those config settings be placed in the first theme’s config.toml file?