No, you need to be right next to it to open the doors. Most remotes these days are bi-modal, i.e. they use one RF system for longer distances (e.g. pressing the "plipper" thing to unlock) and another for very close to (e.g. disabling the immobiliser). The first one works over 10-20m or more (in free air), and it's this one that fires up the 12V system in anticipation of something happening. That's the one that is solved by keeping the key in a Faraday pouch.Does this not also mean that the car would unlock and therefore someone could get in to it? On my Golf I can only use the 'keyless' entry if I'm standing directly at the door/boot.
On the cancellation note, I can't even begin to imagine what it's like to be 1200 miles away from a dealer! There aren't 1200 miles in the entire length of the UK We're lucky in that we're never more than about 30 miles from a Volvo dealer, no matter where we are, and even then we moan about driving 45 minutes to a dealership. If I were you US guys, I'd be giving it a year to get the wrinkles sorted and OTA updates through, as gut feeling says there will be a number more "return-to-base" fixes required yet, based on my experience with other new brands or first-time EVs for brands.