CH340 Serial device doesn't appear in /dev/ (WSL)

I have an arduino nano clone with a CH340 serial chip. It appears in lsusb as QinHeng Electronics HL-340 USB-Serial adapter and when it connects I can see it in dmesg with the following logging:

[   31.251098] vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3)[   31.251544] vhci_hcd vhci_hcd.0: devid(65541) speed(2) speed_str(full-speed)[   31.252004] vhci_hcd vhci_hcd.0: Device attached[   31.538489] vhci_hcd: vhci_device speed not set[   31.608492] usb 1-1: new full-speed USB device number 2 using vhci_hcd[   31.698522] vhci_hcd: vhci_device speed not set[   31.768510] usb 1-1: SetAddress Request (2) to port 0[   31.812328] usb 1-1: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.63[   31.812734] usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0[   31.813059] usb 1-1: Product: USB2.0-Serial

But there is no /dev/ttyUSB*.

Thanks.