Use the “passwords” feature to check if one of yours is compromised. If it shows up, never ever reuse those credentials. They’ll be baked into thousands of botnets etc. and be forevermore part of automated break-in attempts until one randomly succeeds.
One of my breaches was just Google Chrome (back when I used it) logging me entering my password in a self-hosted local web app via https but with no cert… Google. My breach was Google.