The screenshot indicates that you already entered a valid license for Cubase AI and downloaded it?
The application will be called „Cubase AI“. Maybe that’s where the confusion is coming from?
Here’s the official documentation for how to enter the license and download the software, but maybe you just need to launch Cubase AI from your desktop?
You need to activate your license via the Activation Manager. Start it, Login to your mySteinberg account and then you should see the entry for Cubase 12 AI. click on the activate button and that’s it.