Hello! Slowride Pellechio
Welcome to Microsoft Community!
According to your description, you are actually on the Microsoft Defender dashboard page.
After several tests, I found that if you log in to your account for the first time to Microsoft Defender, it will show you the "Go to dashboard" option, and clicking on it will take you to the page you described (which is the dashboard page), and the dashboard page will show you how to protect your devices, keep all your devices safe from threats, etc.
Next, each time you go to the Microsoft Defender application, you are usually taken directly to the Microsoft Defender Dashboard page without having to log in to your account again.
However, if you log out and wait until the next time you log in to your account, the app page may show the "Go to dashboard" option after you log in, and clicking on that will take you to the page you're talking about, which is the dashboard page.
If you have any further questions, please feel free to contact me.
Best regards
InaX-MSFT | Microsoft Community Support Specialist