I don't get it.

As such, users now have the option to choose between cachyos-fish-config and cachyos-zsh-config. "If neither is selected, the system will default to Bash. The default configuration will still be Fish ...

You can choose between fish and zsh and if you don't select anything it selects bash but fish is default? Huh?

Meaning, fish is preselected and you have to unselect fish in order to get bash?

Like:

Which shell do you want (deselect for bash)? [x] fish [ ] zsh