I find it very strange - I don’t really know what to make of it.
I have the wallet shortcut in my control centre. If I use it while on the Home Screen, I end up in the wallet app where I can rearrange and change settings for the cards. If I swipe down the Notification Centre, on my still unlocked phone, and then also swipe down the control centre, and then use exactly the same shortcut, I now end up in the “double-click to pay” version of the wallet, with no rearranging.
Sometimes there seem to be two different apps - the transition to the full app is a sideways transition, while the double-click version slides down from the top of the screen.
However, if I am in the full wallet app, with rearranging options available, and I double-click, it changes the wallet app to the double-click to pay version with no transition.
I notice I am confused!