In Australia, Apple Pay is not widely supported, so the credit card facility is not of much use at this time. On the other hand, the two major domestic airlines certainly support Apple Wallet with their boarding passes.
The question is:
(a) Is it possible to hide the credit card section, or, at least, to move it below the boarding passes? (b) Is this why the double-click short cut doesn’t work to show the Wallet from the lock screen?