Regardless of EV/ICE, the amount of pollution from tires is directly influenced by how much traction is being utilized. Excessive acceleration, deceleration, hard cornering, weight, etc. all lead to excessive tire wear and EVs tend to have elevated figures in all these categories (except cornering I suppose). Instant torque is fun (so unnecessary acceleration is common), braking is regenerative (so minimizing braking isn't as critical to range), and batteries weigh a lot. Therefore, tires shed more quickly.

As for pollution from burning fuel, yes EVs are much better, but there's still some fuel involved upstream in many cases, and the drag from high speed results in less range which means more fuel for a given distance.