Earlier quoted context omitted.
They would block all shipments of Apple devices at the border of the EU after a certain point. The EU controls the customs rules for most of Europe.
So, it's the latter. They will have another excuse to increase the prices further. "We had to spend $BILLIONS to change the design of the iPhone, so this is why the new iPhone EU Edition is going to be 1400€". This is the kind of thing that really makes me understand Brexit.
It seems a tad inconsistent to be against restrictions on imports but also for the kind of fallout that resulted from Brexit. That makes your understanding of Brexit seem incomplete.
And if you don't like price increases on Apple products, don't buy them. That's the only language they understand.