I have got in touch with Lexus UK and their reply has informed me that my car NX450 MY24 is "Upon checking our system, I found that your vehicle is not eligible for the TRACKER and OBD device campaign. This is because it was built on a different platform that prevents criminals from accessing the vehicle in the same way." All this is good news, why no one could tell me this sooner.
They have shown me why I go to Lexus, they still offer some old school service and offered me a free Tracker which I have accepted. This is why this is my second Lexus and in year or so I will be looking at Lexus again