Microsoft is investigating a known issue leading to missing system and user certificates after updating certain Windows 10 systems using outdated installation media through update management tools, physical media, or ISO images. Affected platforms include both client (Windows 10 1903 or later) and server releases in managed environments. Microsoft says it will provide refreshed installation media and updated bundles within the next few weeks as soon as a resolution is available for this new known issue is available. A fix for this issue is not immediately available as Microsoft has just started investigating it and working on a solution over the weekend.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-is-investigating-lost-windows-10-certificates-issue/