Set of files used for generating Unreal Project files via BAT compatible with Epic Games Launcher version of the Engine. I use it with 10x extension that works with both compiled and launcher engine projects.

GenerateProjectFiles.bat

@echo off
rem Run PowerShell script that has actual logic, it is much easier to write power shell vs batch.
Powershell.exe -executionpolicy remotesigned -File %~dp0GenerateProjectFiles.Internal.ps1
exit 0

GenerateProjectFiles.Internal.ps1

$GenerateProjectFilesToolPath = (Get-ItemProperty -Path Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Unreal.ProjectFile\shell\rungenproj\command).'(default)'

Get-ChildItem -Path $PSScriptRoot\. -Filter *.uproject  -File -Name | ForEach-Object {
    $ProjectPath = "$PSScriptRoot\$_"
    Write-Output "Discovered Unreal Project: '$ProjectPath'. Trying to generate project files..."

    $FinalGenerateProjectFilesToolPath = $GenerateProjectFilesToolPath.replace("%1", $ProjectPath)
    Invoke-Expression "& $FinalGenerateProjectFilesToolPath"
}