https://wccftech.com/preview-update-kb5004293-now-available-for-windows-10-version-1909/

After the "mandatory" Patch Tuesday updates, Microsoft delivers a second lot of optional updates that are tagged as "Preview," bringing a number of fixes. These fixes eventually become a part of the next month's mandatory updates, which is why we don't often recommend getting these. But if some particular problem is bugging you and is being addressed, you can get these preview updates through Windows Update or Microsoft Update and Microsoft Update Catalog.

The Windows maker made this month's "C" release optional updates available for the latest 3 versions, including version 21H1, version 20H2, and version 2004. But they are also available for Windows 10 version 1909.