Unfortunately, it doesn't work, only restart🤷.

I can confirm all the answers. It does not work via the app. As far as I know, disconnecting the power supply is the only way.

Guest WLAN can be switched on and off via the app. Unfortunately, it is not possible to shut down individual hubs and restart them via WOL, for example. In addition, the main WLAN cannot be deactivated via the app.

Restarting each hub is possible. I did not find shutdown in the Deco app.