How do I upgrade Windows Server 2019 to new releases?

Question

Licenses for software and other works

Good afternoon, comrades. Tell me, there is Windows Server 2019, activated with a key (there is a sticker on the case), on this server now "Version 1809 (OS Build 17763.1879)", as it is written in winver. The question is, is the server OS updated in the same way as the user branch of Windows 10, as I understand it, now they have the latest release in 2009 (aka 20H2). At the moment, if updates arrive, then only fixes and updates of the built-in Windows Defender (from the latest KB5001342 and KB890830, respectively).

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