Hi, the latest map is 2023 v2 (2023 Q1 data), see attached photo.
It is accessible at the www.lexus-tech.eu and at your local Lexus online too. It is free of charge for the first 3years but after that, it is a payable service. I have exactly the same model and year car like yours and this year I had to buy a new subscription, via Lexus e-shop, for another 3year period at a cost of 130€, this offer is always accessible June of each year, right now with the same amount you buy only 1year of subscription.
In any case you must be very familiar on how to install software of any kind, only then you can follow the procedure provided at the site of the map (you have to register first) or better, ask your local Lexus dealer to do it, since it is very complicated procedure (laptop needed) and it takes 50 to 60 minutes!
I am very familiar with this kind of thinks, so I do it my self for 4years now!