function New-DatastoreByLun {
  param($vmHost, [string]$hbaId, [int]$targetId, [int]$lunId, [string]$dataStoreName)
  
  $lun = $view.Config.StorageDevice.ScsiTopology | ForEach-Object { $_.Adapter } | Where-Object {$_.Key -match $hbaId} | 
         ForEach-Object {$_.Target} | Where-Object {$_.Target -eq $targetId} | ForEach-Object {$_.Lun} | Where-Object {$_.Lun -eq $lunId}

  $scsiLun = Get-VMHost $vmHost | Get-ScsiLun | Where-Object {$_.Key -eq $lun.ScsiLun}

  New-Datastore -Name $dataStoreName -Path $scsiLun.CanonicalName -Vmfs
}

function New-iScsi {
  param($vmHost, [string]$hbaId, [int]$targetId, [int]$lunId, [string]$dataStoreName)
  
  $lun = $view.Config.StorageDevice.ScsiTopology | ForEach-Object { $_.Adapter } | Where-Object {$_.Key -match $hbaId} | 
         ForEach-Object {$_.Target} | Where-Object {$_.Target -eq $targetId} | ForEach-Object {$_.Lun} | Where-Object {$_.Lun -eq $lunId}

  $scsiLun = Get-VMHost $vmHost | Get-ScsiLun | Where-Object {$_.Key -eq $lun.ScsiLun}

  New-Datastore -Name $dataStoreName -Path $scsiLun.CanonicalName -Vmfs
}

Assumes the targets are already visible in the storage adapter, and you just want to create the VMFS volume

Add datastore by LUN ID

Windows PowerShell