Hello Enriquea71,
After reviewing your post, it sounds like you restored the iPhone from a backup and iCloud Keychain did not sync to the iPhone. Make sure you enable it in the settings.
"Turn on iCloud Keychain on your iPhone, iPad, or iPod touch
- Tap Settings, tap [your name], then choose iCloud.
- Tap Keychain.
- Slide to turn on iCloud Keychain.
- If you choose to "Approve Later" when signing into your Apple ID, you need to approve with an old passcode or from another device when prompted. If you are unable to approve, reset your end-to-end encrypted data when prompted. "
Set up iCloud Keychain
Please don't hesitate to let us know if the steps resolved your issue or if you need additional assistance.
Thank you for using Apple Support Communities. Have a nice day.