Find the module names for all commands used in a script

Get-ScriptModules.ps1

#requires -version 7
using namespace System.Management.Automation.Language
using namespace Collections.Generic.Queue

function Get-ScriptModules {
	<#
	.SCRIPTBLOCK
	Given a script, returns a list of all the modules it uses.
	#>

	[CmdletBinding()]
	param(
		#The script that you wish to analyze for modules.
		[ScriptBlock]$ScriptBlock
	)

	$commands = $ScriptBlock.Ast.FindAll(
		<# predicate #> {$args[0] -is [CommandAst]}, 
		<# searchNestedScriptBlocks #> $true
	)
	if ($commands.count -eq 0) {
		Write-Error "No commands found in script."
		return
	}
	

	$commands
	| ForEach-Object {$PSItem.CommandElements[0].ToString()}
	| Select-Object -Unique
	| ForEach-Object -Parallel {
		$commandName = $PSItem
		$foundCommands = Get-Command -Name $commandName -ErrorAction Stop
		$foundCommands ??= Find-Command -Name $commandName -ErrorAction Stop

		if ($foundCommands.count -eq 0) {
			Write-Error "$commandName`: Could not a find module for command. Check spelling and try again."
			return
		}
		if ($foundCommands.count -gt 1) {
			Write-Warning "$commandName`: Ambiguity - Found multiple modules - $($foundCommands.ModuleName -join ', ')"
		}

		[PSCustomObject]@{
			CommandName = $commandName
			Module = $foundCommands.ModuleName
		}
	}
}