Na... it is not a fan-made version of Windows. It's actually a copy of Windows from Microsoft Internal Preview Build which got leaked online. There are also new features only available in the leaked build but still not available on Insider preview builds.
Microsoft has issued a DMCA complaint to Beebom because they were sharing the link to the leaked ISO. The DMCA description confirms that the leaked ISO is indeed Windows 11.
Beebom.com's article is distributing Windows 11 ISO (copyrighted to Microsoft). Please remove their article from the search. It is a leaked copy of the unreleased Windows 11.