I am not sure. I think I did the autotest and it passwd the NFC test (app calculator, .12345+=). They change the phone main board, so there was some small hardware probleme preventing the complete functioning of NFC.
Updating the status of my problem with NFC:I sent the zenphone 8 to ASUS for repair. They changed the main board (within warranty period).Google wallet is working now. I can make payments with NFC. It was probably a hardware problem.