Grabbed this from the Spotify Forums...
You can use Winget to deliver the app via company portal.
$WinGetResolve = Resolve-Path "C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_*_x64__8wekyb3d8bbwe\winget.exe"
$WinGetPathExe = $WinGetResolve[-1].Path
$WinGetPath = Split-Path -Path $WinGetPathExe -Parent
[string]$wingetPath = Join-Path $WinGetPath "winget.exe"
Execute-Process -Path $wingetPath -Parameters "install -e --id Spotify.Spotify --scope=machine --accept-package-agreements --accept-source-agreements --silent"