Your secretary's access by default, limits the "Notes" to keep it private but you can enable permissions for it in the Settings.
Go to Settings on the web app and go to Permissions
Click on the Edit button at the top right (see image below)
Scroll down and check "Doctor's Notes" + "Edit Notes"
Click on the Save button at the top right when you are done
Your secretary just needs to logout and log back in.
The Notes will now be enabled.