how to control visibility of menulets via terminal

on MacOS X 10.11 (and probably before):

$ defaults read com.apple.systemuiserver
{
    "__NSEnableTSMDocumentWindowLevel" = 1;
    "last-messagetrace-stamp" = "775063394.13825";
    menuExtras =     (
        "/System/Library/CoreServices/Menu Extras/TimeMachine.menu",
        "/System/Library/CoreServices/Menu Extras/AirPort.menu",
        "/System/Library/CoreServices/Menu Extras/TextInput.menu",
        "/System/Library/CoreServices/Menu Extras/Volume.menu",
        "/System/Library/CoreServices/Menu Extras/Clock.menu"
    );
}

be cautious: in this command :menuExtra:1 refers to the second entry from the output of the previous command

$ /usr/libexec/PlistBuddy -c 'Delete :menuExtras:1' ~/Library/Preferences/com.apple.systemuiserver.plist
$ killall SystemUIServer

the second command needs to be applied multiple times, at least some times :-)

going from Montery (and probably above, not tested !)

Show WIFI menu-item:

$ defaults -currentHost write  com.apple.controlcenter WiFi -int 18

Hide WIFI menu-item:

$ defaults -currentHost write  com.apple.controlcenter WiFi -int 24

It works instantly, not even needed to killall SystemUIServer