https://wccftech.com/windows-10-kb4586819-18362-1237-and-18363-1237/

This month's Preview builds are out for several versions of Windows 10, bringing a long list of fixes. These preview builds are available through Windows Update but are optional, non-security updates, which means you can wait for next month to get these with the Patch Tuesday cumulative updates.

Microsoft has also released KB4586839 (Build 17763.1613) for Windows 10 version 1809. As for the latest Windows 10 October 2020 Update and May 2020 Update, Microsoft said the preview updates "will be available in the near term."