Yeah, official TfL documentation states that each device is a separate payment method, and therefore has a separate transaction history/capping etc.
However, when I added my Amex to my contactless account, and then proceeded to use my Apple Watch, all the journey information was under the original Amex card… however, when I had to re-add my Amex card to my Watch, a new entry was created.
It does get really annoying if you need to re-add a card to Apple Pay. The new Apple Pay card will have a different card number, and therefore you lose out on capping
Oh, and my phone decided to completely freeze on me when authenticating Face ID for Apple Pay, just as I was getting to the gateline… had to hard reset it. Glad it happened before I was in the queue for the gateline, that would’ve pissed people off no end…
Oh, one other thing. I recommend against using an Apple Watch with TfL. Every few taps, the barrier decides the watch is two different cards and gives a ‘Use one card’ error for about 3 taps before working… bloody annoying. Doesn’t seem to happen with my phone.