Tom's Hardware published a tutorial about installing Windows 11 on a Raspberry Pi 4.
How to Install Windows 11 on a Raspberry Pi 4
The Raspberry Pi is commonly associated with Linux operating systems such as Raspberry Pi OS. But what about running Microsoft OS on your Raspberry Pi? Officially, Microsoft’s only operating system for the Pi is Windows 10 IoT Core, but that is not a true operating system, merely a means to create an appliance with the Pi. Ambitious developers from the Raspberry Pi community are always finding a way to run a full desktop version of Windows on Raspberry Pi.
How to Install Windows 11 on a Raspberry Pi 4