To view what upcoming appointments a practitioner is booked in for head to Settings > Practitioners > select the practitioner > Upcoming appointments.
Here you will be able to see a list of the upcoming appointments for this practitioner. It will list the appointment type name, the date and the time. You can use the arrows to move between pages to view more appointments.
If you select the three dots next on a specific appointment you can choose to 'Got to order' or 'View on calendar', therefore, bringing you directly to the order should you want to make any edits.
If deleting a Practitioner, make sure to check the Upcoming Appointments tab to reallocate the practitioners appointments to another before Trybe will allow you to delete the practitioner. If you attempt to delete a practitioner that has future appointments booked, you will get a warning message stating 'There are future appointment assigned to this practitioner'.