One of the security plugins we install on all our client’s sites compares (encrypted versions of) all the passwords of your WordPress user accounts against a massive database of millions of known-hacked passwords, typically available on “the dark web” to hackers for a small fee, and alerts you (and us) if any matches are found.
We’ll notify you if you’re at risk. You might not be able to log in temporarily if it’s a particularly risky password.
Use the “forgot password?” link on your login page to reset if needed.