how do i back up passwords
How do I back up passwords from my old phone
iPhone SE, iOS 13
Question marked as
Top-ranking reply
Assuming you still have the old phone, and it is signed into your AppleID, you can turn on iCloud Keychain (Settings app > AppleID > iCloud > Keychain). Although this is actually a synch process, not a backup.
Also a password manager app/service such as 1password might be worth investing in.