Bookings created via Graph API

So I have an interesting problem. We are using Graph to create a bookings appointment in a bookings business within our org. When we use Graph the email that gets sent to the customer does not have a link to cancel/reschedule. However if you book an appointment using the bookings page the ensuing confirmation email will have the link.

I check the appointments after they are created and only the one created via the bookings page have 'Let customer manage the appointment' checked. The ones created via the API do not.

The services have it defaulted to allow for customers to cancel and reschedule.

Is there something that we need to pass through graph when we are creating the appointment that specifically will turn this on? Really need the customers to have that link in the confirmation email.