Forgot password in notes on iPhone

There is no reset for a locked note password. You can change the password, but that will only affect notes that you lock in the future. There are 2 methods to lock the note. The first one is to use your Passcode and the other one is to create a unique Password that only you know and is up to you to write it down. Details about locking notes is here and it makes that point clear.

If you use your iPhone passcode, you don't have to create and remember a separate password. If you access your iCloud notes on more than one Apple device, use the passcode or login password for that device to unlock those notes.

If you use a unique password for Notes, there is no way to access your locked notes if you forget the password. If you forget this password, you can reset your notes password and use your new password to lock other notes. If you access your iCloud notes on more than one Apple device, use the same notes password to lock and unlock all of them.



Apple doesn't have access to locked notes and can’t help you access them if you forget your notes password. If you forget your notes password, resetting the password doesn’t give you access to previously locked notes

How to lock or unlock notes on your iPhone or iPad - Apple Support

If you can’t remember the password you used to encrypt the notes, the notes are unreadable.

There is no way to bypass it.

You can change the password for encrypting notes, but it will ONLY affect notes created after the change. you can not change the password for an already encrypted note. The password is the decryption key.