I had an issue for a customer this week where Microsoft Edge had suddenly disappeared from their machine.
Running the Get-AppxPackage PowerShell cmdlet confirmed that the universal application was still installed on the machine:
Get-AppxPackage | where Name -like *MicrosoftEdge*
So Microsoft Edge was still on the machine and fortunately, PowerShell came to the rescue.
Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml" -Verbose}
This successfully reinstalled Microsoft Edge and restored its functionality!
Cheers
Sam