I returned to this location with a coworker today as a test to see if DCC appeared with Google Pay, and it did. The DCC and opt out process was identical, and Google Pay shows NT$160 as the transaction amount. Although I wouldn't test this as I refuse to give the DCC scam one cent, I'm curious if accepting DCC would cause the USD amount to appear under the transaction.

Another interesting difference is that the receipt showed (T) instead of (W) next to the card number.