Windows 10 Build 18963.327 [19H2] comes out to the Insiders as a throttled approach in the Release Preview ring. This update is basically announced for a small subset of insiders (approximately 10%) in the Slow ring. Microsoft continues working on the controlled features and therefore, it affects the number of new features comprised in the build.
With this context, the team has facilitated the “seeker” experience for 19H2. For this, you have to navigate to the following path – Settings => Update & Security => Windows Update. At this instant, you will view Windows 10 Build 18363.327 update available. Simply, choose to download and install this update on your PC. When the update gets succeeded, you will be on 19H2 Build 18363.327.
Windows 10 Build 18363.327 [19H2]
As per Microsoft developers, Windows 10 19H2 is a minor update package for the insiders. It mainly works for performance enhancement, enterprise features, and quality enrichment of the version. Moreover, insiders in the RP ring who get the latest build today will not see all the 19H2 features. This is because the Slow ring currently has not all the features comprised into the build yet.
Besides, users in the slow ring are have not the ability to get the updates to the Release Preview rings.
Source – Windows experience blog.