Thanks everyone.
Well, I don't see the point of enrolling in Asia Miles just to use the App and not ever crediting flights to Asia Miles.
Can CX mobile boarding passes be saved to Google Wallet?
If so, perhaps I could load my trips just when check-in opens, check-in with the app and save the boarding pass to Google Wallet.
In this way, even if the trip disappears by the time boarding is called, I have the boarding pass in Google Wallet.
On QF, even if I am travelling international (hand luggage only), I can get the mobile boarding pass issued if my travel documents do not need to be checked.
So I can simply just walk through passport control and security and straight to the lounge.