Owners and view reservations and reservation details
If an owner is allowed to see reservations, you can also determine whether this owner is allowed to see reservation details. With Reservation details, the owner gets to see the reservation overview, invoices, and chosen extras for each Reservation.
Give Owners rights to see Reservations and Booking Details
To do this, open the object and go to the owners tab. Click new to create a new owner appointment or click the start date and then edit to make a change to an existing appointment. Under access rights, tick Owners can view reservations, and/or Owners can view reservation details.