Turn off Xbox One Controller Win10?

Today I finally got a new controller. Now to my question: Can I turn off my controller without unplugging the Type-C cable? When I press the Guid button, the Xbox overlay opens. I tried it now by pressing for about 10-15 seconds, but the controller did not turn off.

Additional question:

Xbox app on PC, upload your own picture. I don't get the request to "upload your own picture" (see picture)

Turning off your Xbox controller is actually very easy.

All you have to do is hold down the large Xbox button or, as you call it, the Guide button for 6 seconds, after which the controller should switch off automatically.

Additional question:

Xbox app on PC, upload your own picture. I don't get the request to "upload your own picture" (see picture)

Try it on your mobile phone or on the official Xbox website.

Hope I could help.