Sadly the iPad doesn’t have a full Wallet app. You can add and remove debit and credit cards cards in Settings and see basic spending history but that’s about it. Other types of tickets, cards and passes aren’t viewable. I’ve been wanting a dedicated iPad Wallet app for a long time and request it every year, especially now that other things are being added to it, like spending categories for Apple Card users and full transaction history for certain cards (in the UK only for now but hopefully that changes soon).
I suppose, if you need temporary access to your tickets, if you have access to an older/unused iPhone (from a friend or family member or something) you could restore from an iCloud backup of your old iPhone if a backup exists- I believe those types of passes are restored from a backup. They always have been for me.
But yeah, those tickets aren’t currently viewable on the iPad or the web, unfortunately.