Has anyone experienced the coolant leak that you can see apparently I'm adding coolant in the reservoir tank but I don't see anything I don't know if it's a hose or a radiator leak or something else and someone tell me if they've had the same issue and wouldn't usually is it's a 2010 Jaguar xfr

 

So many places a modern cooling system can leak. And many are hidden, round the back, leaking into the undertray etc. If you can't see it then any decent auto mechanic can do a simple pressure test and work out where it's leaking

But given the age you would be well placed to replace all the plastic pipes at the same time to void recurrence.

 

Maybe the plastic pipe at the rear of the engine that links the two heads, they crack with age. Or it could be a leak under the supercharger.

 

On my XFR the water pump was leaking into the V of the engine from the small plastic pipe that goes backwards from the water pump into the engine oil cooler. It was pretty invisible. New water pump, 2 new O rings for the oil cooler pipe, and an aftermarket aluminium replacement for the plastic pipe to the cooler sorted it out. Be aware though, if you break even the tiniest plastic hose while you're doing it, most of the plumbing on the front of the engine has been redesigned and to replace broken bits you may have to move to the new plumbing layout which requires a few more parts!

I would expect the coolant bridge at the back of the engine though as the others have said - you'll see drips from this on the gearbox bellhousing and down the back of the engine if you take the undertrays off.