They are offering a service to check whether they have leaked your passwords or not, you just have to give them your passwords for them to check.
I don't see any reason to give anybody my passwords, no matter what they claim.
Imho the healthiest way over the internet is: trust no one.
However, it's a good way to check how good is their password manager implemented
Do you mind me asking are you using chome? I'm wondering why google doesn't even recognize I'm using an chromium-based keyring to encrypt passwords
Probably something Brave did so Google can't recognize jack shit. It's good to see their password manager works to keep themselves out though, that's useful!
I can't understand what is the essense of having your password checked by an online platform, letting them check if changes are done, if it was hacked or was attempted to be hacked will require to give them access to it, meaning your password which is supposed to be private and only known by you will be given to the chrome which obviously not a good thing to do when talking about privacy. Although google chrome is a trusted and kniwn website, having anyone know your password aside from you is a very risky thing and is highly unrecommended.