Microsoft has addressed the last remaining known issues affecting Windows 10 computers with Conexant or Synaptics audio devices causing errors and problems when updating to Windows 10 versions 2004 or 20H2. Devices affected by the issues can now upgrade to the latest released Windows 10 and Windows Server versions. Windows 10 2004 has been added to the broad deployment channel and is be available to everyone via Windows Update starting February. Microsoft is also “slowly throttling up availability over the coming weeks to ensure a reliable download experience”””
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-removes-last-remaining-windows-10-upgrade-blocks/