JupyterLab uses the shell from which you launched it from. So when you were using JupyterLab, it was using either Powershell or Command Prompt (these are shells; shells are used inside terminals).
Though I don’t use Windows and from what I know, WSL is essentially a Linux installation inside of Windows that you can access through a terminal (and File Explorer too I think). So you will have to reinstall libraries. The shell you’ll be using to access WSL will be bash I think.
There’s this guide on the forums you can try following to setup WSL: How to properly install FastAI on a Windows 11 Machine (WSL) - A 2023 guide