Install-Module -Name MicrosoftPowerBIMgmt

$myArray = @()

Login-PowerBIServiceAccount
Get-PowerBIWorkspace -Scope Organization | ForEach-Object {
        $ws = $_
        Get-PowerBIReport -WorkspaceId $_.Id | ForEach-Object {
            $x = [pscustomobject]@{
                workspaceId = $ws.Id
                workspaceName = $ws.Name
                reportId = $_.id
                reportName = $_.Name
                reportUrl = $_.WebUrl
             }
        $myArray += $x
        }
}

$myArray | Export-Csv "PowerBIWorkspaceReports.csv"