No way. It was on the line at best, there's no way ball was inside the box.
Clearly, it was on the line. He jumped from just inside the box, and landed just outside the box, and the ball hit his arm as he was right over the line. The line, which is considered part of the box, and means a penalty if a foul happens there.
Second, watch the second penalty for Juve. Pjanic clips Pogba's foot, and Pjanic's foot comes down right on the line of the box, the foot he fouled him with, that is. So clearly, not outside the box, again right on the line, which is considered part of the box.
Whether the first was a handball worthy of a penalty, both happened directly on the line of the box, which means penalty for any foul committed. Stop spouting nonsense.