Made up a simple board to plug into the Jetson Nano DisplayPort socket, on order with OSH Park.
I struggled to find a source for PCB mount DP plugs, so ended up ordering a DP->HDMI adaptor and extracting the connector.

For the 40pin eDP socket i asked the LCD supplier to add a couple of connectors and cables to the order, so just waiting for the PCB to arrive. As the LCD has no backlight it only needs 3.3V and the Jetson has plenty of current to drive the panel from the DP connection.

The Kicad project for the board is attached in the file section.