Microsoft is currently in the process of throttling Windows 10 version 20H2. Reason is, to provide new users a positive experience for all who would like to move to Windows 10 20H2.

Windows 10, version 20H2 is available for users using Windows 10, versions 1903 and higher.

Microsoft is currently working on resolving the remaining issues in this new build.

  • N/A Resolved – When installing incorrectly formatted third-party drivers,
    you might receive an error You might receive, “Windows can’t verify the publisher
    of this driver software” or other errors.
  • N/A Investigating – Errors or issues during or after updating devices with certain Conexant audio drivers Devices with affected Conexant or Synaptics audio drivers might
    receive a stop error with a blue screen.
  • N/A Investigating – Errors or issues during or after updating devices with Conexant ISST audio drivers Devices with affected Conexant ISST audio drivers might receive an error or have issues with Windows 10, version 2004.
  • N/A Mitigated – Issues when using Microsoft IME for Japanese or Chinese languages Users of the Microsoft IME for Japanese or Chinese languages might have issues.

So, if Windows 10 2004 works without problems, you can use Enablement Feature Package KB4562830 without any problems. Or use the Media Creation tool to upgrade to the new build.

Source: doc.microsoft.com