Description of the issue:
This is not a bug report, I just found out about “brave://password-manager/settings” and I want to know what this setting does: “Use your screen lock when filling passwords”
So, whenever you wanna use a password which is already saved for the website, it will ask you to authenticate this by asking you to unlock using the screen lock you have set on the device.
This is to protect your passwords from other users (if any) using your device.