I have a Jupyter lab installed on Windows. I installed Jupyter Lab on WSL Ubuntu. I can lunch Jupyter Lab from Linux terminal. This will open Jupyter Lab on Chrome browser
Try going to \\wsl$\{wsl distro name}\home\{user name}\my_linux_folder\
Longer explanation: browse to \\wsl$\ and see what you see there. There should be a distro name (Ubuntu, perhaps?) then you will have access to the root filesystem of your WSL. You can go to the home directory, then select your username, then your files should look familiar.
You could go the other way, and point Jupyter to a windows folder from Linux. However, assuming you might be using WSL2, the first method has much better performance.