how to install wsl 2 from wsl 1 code example

Example 1: wsl2 ubuntu

wsl.exe --set-version Ubuntu 2

Example 2: wsl2 windows 10

//Enable WSL 2 on windows 10 - Run these from an admin powershell
//Enable Microsoft Hyper V first
DISM /Online /Enable-Feature /All /FeatureName:Microsoft-Hyper-V
bcdedit /set hypervisorlaunchtype auto
wsl.exe --set-version Ubuntu 2

"The Hyper-V feature is not required, but Virtual Machine Platform (which includes the Hyper-V hypervisor) is required"