Private notes are located below the shared notes in your 1-on-1 meeting screen. All previous meeting notes are inside the 1-on-1 meeting page.
To access previous meeting notes, open the upcoming 1-on-1 of the attendee.
Upon scrolling down, you will see all the previous 1-on-1 meetings you had with the attendee.
This is where you will find all the meeting notes (shared as well as private) of all the previous 1-on-1 meetings you have had with the attendee.
Here's how it looks:
Alternatively, we have made a ‘Past 1-on-1s’ section on the ‘1-on-1 Meetings’ page to maintain all the 1-on-1s you have already attended. Open any previous 1-on-1 and you’ll find your previous notes there.