https://wccftech.com/windows-10-1909-18363-385-arrives-for-release-preview-ring/

Windows 10 1909 aka the October 2019 Update or the 19H2 branch is due to be released in the next few weeks. Microsoft has today released 19H1 Build 18362.385 and Windows 10 19H2 Build 18363.385 (KB4517211) to the Release Preview ring Insiders.

Those who are currently running Windows 10 19H1 Build 18362.329 will get 19H1 Build 18362.385 today. Release Preview ring Insiders who are on 19H2 Build 18363.329 will get Windows 10 19H2 Build 18363.385.