USB Type C is only the connector specification, and it offers very little guarantees about what protocols are actually supported through the connector. External

USB Type C is only the connector specification, and it offers very little guarantees about what protocols are actually supported through the connector. External graphics would require a USB Type C port with support for Thunderbolt 3, which is an entirely separate specification from the USB 3.1 spec that's usually the baseline for such ports, and offers 40 Gbit/s in bandwidth vs USB 3.1 Gen2's 10 Gbit/s (and Gen1, which is more commonly used, is only 5 Gbit/s). I couldn't find any mentions of Thunderbolt in its specs, so I don't believe external graphics is a possibility here.