Googling suggests that there are eTcl versions with X11 support.
If yours has then you still have to set the correct window title for anything to be shown. The KT environment uses the X11 window title for deciding how to stack and display the X11 windows. See this thread https://www.mobileread.com/forums/sho...d.php?t=162022
For a quick test of a X11 program you don't need to do anything else as the touch event on the KT is mapped to a standard X11 left mouse click event.