After installing the update KB4496796 on your computer running the build 18356.16, the version number will bump to build 18356.21, and in a few days, Windows 10 build 18362 should download and install automatically on your computer.

Download Windows 10 build 18356.21

Although there are no ISO files for Windows 10 build 18356.21, the update is available immediately through the Slow ring. This preview build will download and install automatically on your device, but you can always force the update from Settings > Update & security > Windows Update, and clicking the Check for updates button. You can also check out these resources:

Windows 10 version 1903 (19H1): All the new features Windows 10 version release history tracker

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