Current status as of July 22, 2020
Windows 10, version 2004 is available for users with devices running Windows 10, versions 1903 and 1909, who manually seek to “Check for updates” via Windows Update. We are now starting a new phase in our rollout. Using the machine learning-based (ML-based) training we have done so far, we are increasing the number of devices selected to update automatically to Windows 10, version 2004 that are approaching end of service. We will continue to train our machine learning through all phases to intelligently rollout new versions of Windows 10 and deliver a smooth update experience. The recommended servicing status is Semi-Annual Channel.
https://docs.microsoft.com/en-au/windows/release-information/status-windows-10-2004
