I've tested type c adapter in both Windows and hack and this is my observations:
1) in Windows my adapter is recognized as usb type c video adapter, monitor works. But when I turn off my gtx1060 in device manager, adapter still in usb devices list, but no picture on monitor. I can assume that at least in Windows all video outputs go through Nvidia.
2) in hack adapter is listed in usb devices, but no video output
I think this adapter uses type c alternate mode .
I wonder if there is a way to make it work with framebuffer patches. If not - then all we can do is to use usb to hdmi converters (not type c alternate mode).