Custom Lock Screen

I believe it would be better if we can choose our own lock screen and not auto use our phones lock screen. I would like a different password from my phones normal lock screen password to be implemented to braves privacy tab. SO When ever I turn on a password, I’ll have to out in password1 and when i want to go to the private browes I’ll need to use password1. I would really like to see this change as I believe it would improve security.