The latest version of the Mac OS (10.15 "Sequoia") now comes with a "Passwords" app that assists in the management of passwords, creation of secure passwords, etc.
It will also tell you if a password you've been using has been "compromised" (through data leaks, etc.).
I'll take a guess that there are 3rd party apps that also do this, but since most people probably don't USE such apps, having one "built into" the OS is a step forward.
I created my own "password archive" database some time back.
Works for me for now -- although when I get a new Mac, might switch to the Apple Passwords app instead...
(I have no idea what Windows folks use)