Don't think it was a clear pen, it was for sure one of those where if that is at the other end we are screaming for it. Xhaka definitely makes a stupid move to dangle his leg and gives Zaha the chance, but the way he falls is so exaggerated that you can see he was looking for it.
Whether thats accepted now as a clever 'winning the penalty' move idk but we had a handball goal anyway so f**k it.