Included in the notes about the Windows 11 Dev Channel release today at Announcing Windows 11 Insider Preview Build 22518 | Windows Insider Blog (https://blogs.windows.com/windows-insider/2021/12/08/announcing-windows-11-insider-preview-build-22518/):
QuoteWe're making it easier to install WSL (Windows Subsystem for Linux) from the Microsoft Store.
Bleeping Computer has a nice article about it at Windows 11 can now install WSL from the Microsoft Store (https://www.bleepingcomputer.com/news/microsoft/windows-11-can-now-install-wsl-from-the-microsoft-store/).