However, unless they find something wrong with the tyres you still might end up back at square one. Tyres just don’t wear like that because the actual tyres are faulty, that wear pattern has something to do with the set up of your car.
Hey I’m no expert and I’m just basing it on common sense.
The OP's car is an A3 E/tron and is front wheel drive and the wear he states is normal for front and rear tyres. The real issue is tyre separation down to the steel belts and that is not normal. He was correct in informing Pirelli of the situation as that could lead to a recall of that tyre, if they find a manufacturing defect. If, that is not the case they will at least inform the OP to what was the issue on this tyre.