First, install usbipd-win like explained on Connect USB devices microsoft web page.

Once done we can list the usb devices in powershell.

PS C:\Users\Red> usbipd wsl list
BUSID  VID:PID    DEVICE                                                        STATE
1-3    046d:c083  Périphérique d’entrée USB                                     Not attached
1-4    04d9:0180  Périphérique d’entrée USB                                     Not attached
1-8    041e:324a  Creative MUVO 2c, Périphérique d’entrée USB                   Not attached
1-9    0403:6001  USB Serial Converter                                          Not attached
1-13   0b05:1939  AURA LED Controller, Périphérique d’entrée USB                Not attached
1-14   8087:0029  Intel(R) Wireless Bluetooth(R)                                Not attached

And then attach the USB serial converter to WSL by using it’s BUSID.

PS C:\Users\Red> usbipd wsl attach --busid 1-9

Now, you can check the USB devices connected on Linux side.

red@DESKTOP-ATO322N:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 0403:6001 Future Technology Devices International, Ltd FT232 Serial (UART) IC
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Let’s check if the interface appeared in /dev.

red@DESKTOP-ATO322N:~$ ls /dev/ | grep ttyUSB

We can now use minicom (in my case serial port is connected to my BeagleBone Black).

sudo minicom -D /dev/ttyUSB0 -b 115200

Note: you may need to disable the HW flow control option (Ctrl A+Z, go to O “configure minicom”, and “Serial port setup”, turn it off by typing F).

Welcome to minicom 2.7.1

Compiled on Dec 23 2019, 02:06:26.
Port /dev/ttyUSB0, 23:47:43

Press CTRL-A Z for help on special keys

debian@BeagleBone:~$ uname -a
Linux BeagleBone 5.10.168-ti-r71 #1bullseye SMP PREEMPT Fri Sep 1 04:05:07 UTC 2023 armv7l GNU/Linux