Open the Settings app on your iPhone. Scroll down and tap on Passwords & Accounts. Tap on Website & App Passwords. You may be asked to authenticate using your passcode, Touch ID, or Face ID. You'll see a list of saved usernames and passwords for various websites and apps. You can use the search bar at the top to find a specific password. To view a password, tap on the entry, and it will display the username and password details.