Just came across this old news from Apple newsroom dated 5/21/2024:
Customers can add a Navigo card to Apple Wallet and simply tap their iPhone or Apple Watch to ride the metro, train, bus, and more in the Paris region
In Apple Wallet:
- Tap '+' to add card to Wallet
- Tap 'Transit Card'
- Scroll down and tap 'Navigo'
- Tap 'Continue'
- Tap the pass (1-Day all zones, 1-Day zone 1-3, multi days, t+, Carnet 10 t+, RoissyBus, etc) you want to buy
- Tap 'Buy' and complete the process
In order to add Navigo (île de France mobilités) to my Apple Wallet; I bought one t+ ticket just so I can complete the initial process. Once that's done you can tap on 'Buy More' to buy the same type of pass later; but only after you have used the existing one (I believe it does not allow two identical passes at the same time). To buy different type of passes; tap the more options menu icon (circle with 3 horizontal dots) at the right top corner and tap 'Buy Passes'