“Satellite radio preparation” likely means you will have the wiring but not the tuner module (which I assume they are having supply issues with). So it’s probably possible to install the tuner and enable satellite radio later, once the part is available.
At least that’s how it worked on older vehicles like my E90. “Bluetooth preparation” used to be a thing too, if you go far enough back. It meant the car on the lot didn’t have the feature the dealer could add it on for you, since all the wires are there.
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