Nintendo Switch> image on gamepad and monitor visible?

Can I somehow adjust that the image is visible on my switch "Gamepad" and on my monitor at the same time? When I play with my pro controller, it's always on a monitor, but when I play on the gamepad, my monitor goes black.

If it's in the dock, you can't see the screen anyway and if you play on the GamePad, how should the screen content be transferred to the monitor? This is technically not technically and that is also logical, how should the whole come on the monitor without cables?

Well, it went on the Wii you too, so I thought it should go on the switch too. Well, it probably has something to do with the fact that the gamepad of the Wii you is not the console itself.

Yes, the console is the switch. The dock can no longer be adapted as USB Type-C to HDMI and USB.