RB6 Cheatarmy Full DIRECTX11

[NY.]

You need to ensure your running dx11 i will explain how to check both below 

Open your Steam client and navigate to your game library.
Right-click on Rainbow Six Siege in your game list.
Select Properties from the context menu. This will open the game's properties window.
Ensure you are in the General tab, which should be the default tab when the properties window opens.
In the Launch Options section, click on the dropdown menu.
Select Dx11 from the dropdown options.

for Ubisoft 

Open your Ubisoft Connect application.
Navigate to the Library tab to view your game library.
Click on Rainbow Six Siege.
Click the dropdown icon next to the Play button.
Select Play Rainbow Six Siege (dx11) from the dropdown options.

i would like everyone to reboot do not inject open your platform steam or ubi and launch DX11 and see if you get a qb update if you get one let it install once the game restarts close the game you can now try to inject press space when it says complete and launch DX11.  You also need to make sure all overlays are off the main ones are listed above.

Also if your on windows 11 23h2 use no spoofer as it can interfere with your connection

and lastly this is personal preference and since i cannot see every users task manager for me i keep everything disabled at startup sometimes there is things there that can also block the menu.  If you have done all these steps and are still not seeing the menu then your build is affected and its being worked on.  So please try and report back