If you need Ubuntu 21.10, there's no need to go off and fire up a virtual machine; you can quite easily install it on Windows 10 or 11. You just have to know where to look.

elementary OS is a popular Linux distro not offered through the Microsoft Store, so here's how to install it on WSL.

Kubuntu is an official, lightweight Ubuntu-based Linux distribution. If you want to try Kubuntu on VirtualBox in Windows 11/10, follow this guide.