Hmm...have you tried running AH in Dx9 rather than Dx11? I am running Win11 as well and while it works fine for me, I've always seemed to have better luck with Dx9 (although Oculus uses Dx11 now)
Dx9 can be launched from the game folder, there are separate EXEs.
When it opens, the window comes up to a white screen and then closes itself? Or does anything else happen in the meantime? Something else to check is the event viewer. Under Windows Logs -> Application if the AH exe is crashing, it should list it and hopefully tell you why. Could be video card drivers, audio, a corrupt dll, etc.