https://wccftech.com/windows-10-version-2009-installed-through-a-master-switch/

Microsoft has been testing Windows 10 20H2 for quite a while now. Similar to last year, the 2020's H2 feature update will be delivered through an enablement package for devices running the May 2020 Update, version 2004, making sure the update process is extremely quick and fuss-free. To help its commercial customers see just how easy the process would be and test the upcoming features, the Windows maker has opened Windows 10 version 20H2 for commercial pre-release validation.

"Windows 10, version 20H2, is now available for commercial customers to begin feature exploration and validation prior to being released for general availability," Microsoft's Aria Carley wrote.