Stored passwords
HOW DO I TRANSFER MY STORED PASSWORDS FROM MY OLD PHONE TO MY NEW PHONE?
HOW DO I TRANSFER MY STORED PASSWORDS FROM MY OLD PHONE TO MY NEW PHONE?
Above answer, and in more detail: Set up iCloud Keychain - Apple Support
Above answer, and in more detail: Set up iCloud Keychain - Apple Support
On the old phone go to Settings/[your name]/iCloud and turn on Keychain. Then do the same thing on the new phone.
Stored passwords