https://wccftech.com/more-devices-will-be-automatically-updated-to-windows-10-version-2004/

Last month, Microsoft announced that it had begun to train its machine learning based process that is used to automatically update devices that are approaching end of service. This means automatic installations of the latest Windows 10 version 2004 (May 2020 Update) started for devices that are running versions 1809 or earlier.

In an update, the Windows maker has now said that it is starting a new phase in the rollout of Windows 10 May 2020 Update, which means more users should expect to see automatic updates to the latest version.