These modified ISOs are often distributed with tools that bypass Windows Activation. Using Windows without a valid license is a violation of Microsoft’s Terms of Service. Additionally, activation scripts found in these ISOs are frequently flagged as trojans by antivirus software.
That being said, here is a download link for Windows 11 ROG Edition ISO:
Searching for a "Windows 11 ROG Edition ISO" typically leads to one of two things: a modified by third-party enthusiasts, or a search for the official recovery image for ASUS ROG devices like the Ally or Strix laptops.