Two way sync between Bookings and Zoho Mail Calendar

Two way sync between Bookings and Zoho Mail Calendar

Is there a way to enable a two-way sync between Bookings and the Zoho Mail Calendar? As far as I know, it is only possible to check conflicts from Bookings and push meetings from Bookings to the Calendar. However, when I press the sync button, appointments created in Zoho Mail are not pushed to Bookings, so I cannot see all the meetings in the Bookings Calendar.