Following is a list of GUI-based programs, which are provided with Windows Server 2019 Core:
Control.exe intl.cpl
— sets up region information
Control.exe timedate.cpl
— sets up date & time
Regedit
— registry editor
Notepad
— hmm.. what would that be?
Msinfo32.exe
— displays comprehensive system information
Taskmgr.exe
— can also be executed via ctrl-alt-del
Msiexec.exe
— Windows Installer
Cmd.exe
and powershell.exe