I normally download cup tickets to Apple Wallet from the email.
However, having the App as backup proved useful at the PSG game.
As I was walking to VP, I suddenly realised that I hadn't seen a ticket email.
Searched my messages, but nothing showed up. Luckily the ticket was in the App, so I downloaded from there.
The ticket email must have been accidentally deleted while I was clearing out all the junk/repetitive messages that Villa send out