Private/Get-CloudPCManagedDevice.ps1

function Get-CloudPCManagedDevice {
    <#
    .SYNOPSIS
        Returns the Intune managedDevice record for a given managedDeviceId, including usersLoggedOn.
    #>

    [CmdletBinding()]
    param(
        [Parameter(Mandatory)][string]$ManagedDeviceId
    )

    $select = 'id,deviceName,userPrincipalName,userDisplayName,lastSyncDateTime,usersLoggedOn,azureADDeviceId'
    $uri = "https://graph.microsoft.com/beta/deviceManagement/managedDevices('$ManagedDeviceId')?`$select=$select"

    try {
        Invoke-MgGraphRequest -Method GET -Uri $uri
    }
    catch {
        Write-Verbose "Get-CloudPCManagedDevice: $ManagedDeviceId not found ($($_.Exception.Message))"
        $null
    }
}