This is a common security feature on Dell business-class laptops (like the Latitude E-Series and newer). Here is a breakdown of how this system works and the methods available to regain access.
The BIOS password, also known as the Setup Password or Supervisor Password, is a security feature that prevents unauthorized access to the BIOS settings. If you set a BIOS password and forget it, you won't be able to access the BIOS settings or make changes to the system's configuration. In such cases, resetting the BIOS password becomes essential. Dell Latitude 8fc8 Bios Password Reset