My car has been serviced several times by 2 different dealers both for routine annual services and warranty repairs.
When I go to the JLR service record
:https://jaguarlandroverdiplomatic.co...ervice-history
there is no record of any service event.
One thing I did notice is that my warranty began 30 days before I purchased the vehicle.

 

If it helps, ask both dealers for a printout of the service history, as a record for yourself, and to hand to the next buyer. If they claim that they can't because of privacy laws (never mind that it's your own car!) you can ask them to cut off the owner information at the top of the page. They did that for me on the previous owner's service history.