It is an official Microsoft product. It is a custom, unofficial, pre-activated “modified” Windows ISO created by an individual or group (often from the “TeamOS” or similar modding forums). These builds are designed for people with low-end or older PCs who want to:
These modified versions often disable Microsoft’s heavy data collection and telemetry by default, which is a major selling point for privacy-conscious users. windows 11 pro phoenix gamer edition