Using pyfirmata in WSL
There is alot of information in the web how to run your first arduino projects.
Most of information covers Arduino IDE or native python on Windows
(For exmple - using COM as serial name instead of /dev/ttyS3 ).
The link below provides checklist for running your first Arduino project in WSL1 : https://github.com/yanivpaz/code-examples/tree/master/python-arduino