It’s possible, but it costs money to design the hardware so it’s accessible, it has to use a connector which has to be robust against vibrations (is m.2 robust?), then there needs to be a standardized protocol to communicate with the card. Does the car computer need to know how to authenticate against the cell network or does the card? Is it industry standardized or specific to the manufacturer? All kinds of things need to be designed and car manufacturers have no reason to invest in they.
They’re forging the GPS to look like it’s in the EU. Do we turn off all the EU terminals too?
I’m a little surprised they can’t identify spoofing by comparing the incoming signal to the proposed location. They already have antennas that can be steered using the phased array.