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.
For me, if this happens, it has no impact since almost every page i sign up to has a unique password. The most important ones has mfa as well.
Use a password manager. Simple.
1Password and Bitwarden both work across multiple devices, os's and browsers. Work uses 1Password which i have on work computer and work phone. i use bitwarden across home desktop, laptop, phone, homelab, testing phones