I tried installing Google Wallet from Aurora Store, but every time I launched it, it immediately exited, displaying "there was an error logging into primary account" error.
I uninstalled Google Wallet and navigated to
Settings > Apps > Sandboxed Google Play > Google Settings > Settings for Google apps > Google Wallet. I was able to access Google Wallet this way and added my transit card.
I wanted to add money to my card so I selected "Add Payment". There was an option to tap to enter details automatically. I placed my phone on top of my debit card. I heard a chime and the screen flashed white for a split second, but nothing happened. Am I missing any dependencies? Is Google Play Services missing the permissions to read my card? NFC is already enabled.