I need in fact the touch 🙂
here some updates :
I figured out that when using the spacedesk viewer app from the windows store there is not the [x] cross when fullscreen.
the thing with the ap from the windows store is that we have to click or touch with 3 fingers to take control.
to bypass this, i just simulate two click (one for the “take control” window to appear and the second one to click on “take control” and here i am with a fully automatic controled fullscreen spacedesk viewer app connected !