https://www.bleepingcomputer.com/news/microsoft/windows-10-2004-breaks-fresh-start-how-to-still-use-it/

With the release of Windows 10 version 2004, Microsoft has broken the 'Fresh Start' feature that allows you to perform a clean install of the operating system while retaining your data.

For users who want to perform a quick and automated reinstall of Windows 10, Microsoft offers Reset this PC or Fast Start features.