Tires are tires, I don't think it's possible to distinguish between EV tires, truck tires, and regular cars' tires.
(And right now 1 million out of Germany's 48 million cars are EVs, so that's a tiny fraction).
But it is true that EVs are heavier than combustion cars of comparable size, and therefore contribute more microplastic per km.
@CelloMomOnCars
I am sorry, this was a sarcastic comment only highlighting that EVs are not really part of the solution. But instead we need mobility centered around walking, cycling and public transit.