FORGOT MY NOTES PASSWORD

Hello.

Unfortunately, there's no way to recover the forgotten password for the previous notes, however, you can change your passcode for the future ones.

Head here for the instructions:

Lock notes on your iPhone, iPad, iPod touch, and Mac - Apple Support

Hello...

Try This one.

Go to Settings>scroll down>Tap on Note>Password>Reset Password>put your Apple ID password.

This way you can reset your note password.