I'm skeptical about this: shouldn't this just be a browser feature? I use Bitwarden which can do this and I do it regularly. Seems weird for each website to implement its own password generator when the sites have no way of telling the browser/password-manager to save it.

I see your point. The idea was that the password generator would guarantee the generated password meets the configured minimum requirements for length and strength on the site, especially since our strength calculator uses a custom algorithm. This is not something that can easily be done on the password manager since we check for more than just length and use of specific character groups (we also check for dictionary words, repeating characters, use of usernames/emails/dob in the password, etc).

Most password managers that I am aware of will prompt / allow you to save credentials upon login and sometimes even upon saving a new password.

That makes sense.