I bet you are!
The Jaguar Service Schedules show the supercharger drive belt and front accessory drive belt on my V6S are to be renewed on the 144,000 miles / 108 months (9 years) service.
The same applies to the V8R.
The Service Schedules can be found here https://osh.jaguar.com/
Just enter your car’s VIN, select your country, click on ‘Servicing Information’, in the ‘Service Type’ box click on the dropdown arrow and it will show all the Service Schedules, select whichever service you require then ‘submit’.