I found this great post on how to replicate the Windows 10 Start Menu to other profiles on the same computer.
In brief, run this command from powershell to export the start menu as you've configured it:
Export-Startlayout -path C:\Windows\Temp\SMenu.xml
Then run this command from powershell to apply that layout to all other profiles:
Import-StartLayout -LayoutPath C:\Windows\Temp\SMenu.xml -MountPath $env:SystemDrive\