Once an Insider updates their PC to the October 2020 Update, they will continue to automatically receive new servicing updates through Windows Update (like the monthly update process).”
In this regard Microsoft specifies: “Please note that the October 2020 Update will be available to Insiders in the Release Preview Channel via our “seeker” experience in Windows Update at first.
Windows 10 October 2020 Update will roll out in stages.
Microsoft has just given a name to Windows 10 version 20H2, October 2020 Update.
Windows 10 October 2020 Update is not a major release.