I have an update. I forgot to mention I also have my train check-in check-out card in the same case where the iPhone SE3 is in. it's the white with red card in the picture.
So I tested cards out, cards in, one card in, card in top, middle, lower position and guess what I found that triggers the Apple Pay event?
- It really is the white with red card
- no Apple Pay trigger without the card
- no Apple Pay trigger without the phone either
- card needs to be in the top position
- card needs to slide a little bit higher than in the picture, so that the card top edge aligns with the edge of the leather case
- the iPhone SE3 display needs to be on. No need to unlock the phone, just display on works
- If the display is off when I bring the 14ProMax to the SE3, no event. When I then press the SE3 right button while the 14PM is still on top, the event is triggered.
- When I first press the SE3 right button to activate the display and then immediately bring the 14ProMax to the SE3 (before the display goes black again), the event is triggered
So the train card definitely interacts with the NFC chip in the phone.
I pushed the card downward, like in the picture, now the Apple Pay trigger hasn't showed up so far (10 tries).