App Passwords only list the last 10 in Bitbucket UI and older app password are hidden.

Upon creating more than 10 App Passwords on Bitbucket UI, the oldest App Password will not be visible in the UI. The UI only displays the last 10 app passwords.

However, the App Password can still be used even though it's not visible on the UI and the app password isn't revoked.

To revoke that the old password, you will have to revoke the latest app password for the older app password to be visible in the UI.