Have you tried that lately? It was probably true for Windows 10, but not 11. There is no supported path to install 11 if you don't have the Microsoft-approved hardware with TPM etc, which would certainly include Raspberry Pis. Installing Windows 11 on non-Microsoft-approved hardware seems to require levels of jank at least as bad as anything I've seen in Linux. Advice is all over the place, usually involving full reinstalls, setting random registry keys, running Powershell scripts downloaded from a random Github repo as Admin, or something along those lines. And no telling which if any work at any particular time, since Microsoft is constantly fighting them apparently.