Due to the complexities involved in security software unfortunately many kernel-level anti-cheats, including BE, are not compatible with this feature yet. Recently Microsoft has started to ask Windows 11 users to enable this security feature and if they do so it will cause the BE driver to be unable to load.
When launching the game I get a “Failed to initialize BattlEye Service: Driver Load Error (1275).” error and Windows displays a popup reporting that BEDaisy.sys cannot be loaded on this device due to a security feature called “Hardware-enforced Stack Protection”.