If you have to reinstall a distro for WSL it loses the default setting so that bash from PowerShell no longer works.
Here is the fix
wsl --list
This will get the current distributions on your machine. The distro you installed should be there
wsl --set-default <distro>
Replace <distro> will the distro name
Use wsl -l -v to list the WSL version and distro versions
Use wsl --distribution <distro> to start a distro, it’s the same as doing bash from PowerShell.
Use wsl -t <distro> to terminate a running distro.