That's because Windows 11 only comes in 64-bit flavors and Program Manager as bundled with XP would be 32-bit. WoW64[1] can't bridge 64- and 32-bit binaries in the context of system components, such as the shell.
Try running that under 32-bit Windows 10, I never tried it myself but I have a feeling it should work.
Try running that under 32-bit Windows 10, I never tried it myself but I have a feeling it should work.
[1]: https://en.wikipedia.org/wiki/WoW64