Did you ever figure this out? I'm in the same situation, sort of. Polestar map is available for my car (2018 XC60 R-Design T8) in Europe but not in the US where I currently live. Apparently it has something to do with EPA restrictions.
Not yet...
In my case, however, I believe I am one step further than you as my car is BR designated (Brazil) and the Polestar Optimization, although available for my car/engine (XC90 2017 T6, engine B4204T27) it is not authorized by Volvo to be installed in Brazilian cars, probably due to some kind of certification as well.
But I explored a few options further...
In October accessed my car through VIDA (I purchased a 3 day full client subscription) and could see the Polestar Performance Optimization as a software listed for my car on the software list (it showed up as "Perf. opt. b4204t27+ appl", part number 31459915, size 289kB). I tried to order it but the purchasing system didn't allow me to go on with the purchase. When I tried it I got a message: "Software not found - The item you are trying to order is not available. Confirm the part number and create a help request referencing the part number that you are trying to order"
Contacting VIDA support, they told me the sw could only be purchased from Volvo and installed by registered US dealers (supposedly due to an agreement between Volvo and the dealership network). So this was a dead end there already...
Last weekend I purchased another VIDA full subscription for a few days and now the same software does not even appear in my list of possible downloads / installations... I even inserted the sw part number manually but got a message saying "105 - Client is not authorized to access PIE server"... deader end...
So, I found out that, in Europe, you can register and use the VIDA client software if you are an independent shop. There, you buy the software part number from the dealer and the indie install it. So, I thought, I would register as an indie (through a VPN?) and order from a local dealer... However you need a VAT tax code and actually have some other business actual registrations to do it... so... although I was still willing, it involved more steps and investments...
Also, even if I went that way, I would still need to buy the software from a dealer. The problem is, when buying from a dealer he checks my car's VIN and sees that is BR registered and that he cannot install that sw in my car. So he is likely not to sell it to me, even if he can buy it from Volvo for my VIN... Likely, dead end here too...
I also tried contact with a US dealer directly and gave him my VIN. This one told me he would sell and install it for me, but I would have to bring the car in their shop... which is kind of a long trip, since I am in Brazil... dead end...
or is it?
I recently found a way that seems to be possible to connect the car remotely to VIDA... So, if I find a US dealer friendly enough to install the sw in my VIN AND make an unorthodox long distance connection to my car, there might be game!
The other option might be the path Power6 is exploring, which seems to be a fantastic overall effort which could open this and other possibilities!
