Where are the pmset settings saved? In which path exactly are the pmset settings saved?  The manpage says it's stored here.  However, I couldn't find any settings there.

The macOS Energy Saver preference file is stored
at:
/Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist
/Library/Preferences/com.apple.PowerManagement.plist
I recommend EasyFind to track down system files, as Spotlight won't search them. It doesn't index, so it's slower, but if it's there, it will find it.