I was able to PXE boot an XPS 13 9350, to reimage it. I had to use a usb-c to network adapter (from Dell), but I read in another forum that a generic usb-c to network adapter should work. Also, I had to enable boot from Thunderbolt in the bios, hidden in the bios menu somewhere, so make sure you dig through through the bios looking for anything related to Thunderbolt.