JRE required Suica to be instantly accessible so there's a setting in Apple Wallet to set a card to a default quick transit use card(forgot the exact name). If configured as such, just poking the gate antenna with earpiece end of an iPhone instantly completes the transaction just as fast as a real card does.

(yes, the antenna is in the top FaceID/Dynamic Island area, Osaifu Keitai spec requires a □つ icon wherever antenna is located, which Apple managed to completely ignore)