Microsoft released them today Windows 10 in version 20H2 on the Release Preview channel. The feature update became available as an activation package named KB4562830.
This is the final stage of testing before the operating system is distributed to everyone.
The 20H2 version will be available on devices currently running with Windows 10 of the 2004 version using the KB4562830 activation package. It's the same technology that Microsoft used to update the Windows 10 of the 1903 edition to the 1909 edition.
If your device is set to receive updates from the Release Preview channel, just try pressing the Check for Updates button and you will see if the update is available for your device.
The 20H2 version of Windows 10 is a small update with performance and quality improvements.