Hi Rising Flight,
The latest version of Windows PowerShell is 5.1. If you want to install PowerShell Core, you can download the latest version of MSI package which is currently 7.4 from GitHub.
https://github.com/PowerShell/PowerShell
Winget is not currently supported on Windows Server 2019.
https://github.com/microsoft/winget-cli
Best Regards,
Ian Xue
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