Where are Passwords Stored?

Just looking for a simple answer to the question. Where are passwords stored by Brave Browser Nightly on my desktop macos system? In files within the profile directory? In sqllite database? In the Apple keychain? I have a password for this site saved to my Brave Browser passwords, but there is no sign of that password in my apple keychain. Should the saved passwords be in the keychain?

Currently, there are three passwords saved in Brave Browser Nightly (normally a few hundred). Here is what they look like:


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When searching for these passwords in keychain, no match: