neowin[.]net/news/microsoft-quietly-updates-official-lightweight-windows-11-validation-os-isos-for-24h2/
Similar to WinPE, this is a very minimal or bare bones version of Win11 with only a command line -- no GUI. I could see it being more appropriate in some cases than WinPE, say as a way to run backup or partitioning software outside of full blown Windows, or if someone running Linux didn't need a full copy of Windows in a VM.