see wsl version code example

Example 1: get wsl version

wsl -l -v
# If version 2 is installed properly, you will see the version number. 
# If you don't see a version number, or if you see an error message 
# you have version 1

Example 2: how to check wsl version

dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart