After a long delay, Microsoft finally pushed out a new build to the Release Preview Ring.
For around 10% of Windows 10 Insiders on the Release Preview Ring Microsoft is offering a version 1909 update available for those Insiders who Check for Updates in Settings. After they install the update, their OS will be updated to 19H2 Build 18363.327.
Despite being set to the Release Preview Ring this is not in fact a near-final build of Windows 10 19H2. Microsoft is merely testing its throttled approach to pushing out the OS update. Microsoft intends to push out the OS as part of the monthly Cumulative Update process for those already on Windows 10 19H1.
Windows 10 Insiders in the Release Preview ring who get 19H2 Build 18363.327 today will not see all the 19H2 features the Slow ring currently has as not all the features have been incorporated into the build yet. Because of the differences between the way the 19H2 updates are packaged between the Slow and Release Preview rings, Insiders in the Slow ring will not be able to switch to the Release Preview ring and get updates yet. Microsoft says Insiders who are thinking of switching rings should stay put for now.
Windows 10 Insiders in the Release Preview Ring should Check for Updates at Settings > Update & Security > Windows Update and may be lucky enough to find a new build there.
Read more at Microsoft here.