Just installed a couple of Windows Server Core 2019. To manage them through PowerShell remotely, you need to enable PowerShell Remoting
On the Windows Server 2019 Core, run the following command
> Enable-PSRemoting -Force
The remote machine from which you want to manage the server
> Enter-PSSession -Credential (Get-Credential) -ComputerName my2019server.domain.tld
Enjoy!
