I forgot my password for notes

According to Apple:

To unlock a note, you need to enter the password that it's locked with. If you forgot your notes password, Apple can't help you regain access to your locked notes.

Also worth mentioning:

Beginning in iOS 16, you have two options to lock your notes. You can lock notes with your iPhone passcode or you can create a unique password only for Notes.

Need more help?

• Chat now or call 1-800-APLCARE.
• International Support.

Click here and see the last section. This won't restore access to already-locked notes; to do this, you'll need to correctly guess the old one.

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The only way to get them back is to remember the password.