Notes app won’t let me unlock notes even after I reset password

I can tell you this that Apple cannot help you with this. Unless you can remember the password, the notes will remain locked forever and be unusable.

The text in italics was copied from here.

How to lock notes on your iPhone, iPad, and iPod touch - Apple Support

To unlock a note, you need to enter the password that it's locked with. If you forgot the password, Apple can't help you regain access to your locked notes. You can create a new password, but this won’t give you access to your old notes. A new password will let you password protect any notes that you create going forward with the new password.

You need the password that originally locked the notes. Notes locked with

the old password will remain locked until you remember the old password. Notes

made with the new password can be unlocked only with that new password.

You can try contacting support for assistance. None of your

fellow users in this forum will be able to provide your forgotten

password or enable access to the protected notes.

Generally, Apple holds that it is the user's responsibility

to keep track of passwords used to lock Notes and other

items. If the password protection were easy to circumvent,

it would be worthless.

Contact Support

Good luck. Please update with what you find out when contacting

support.