Other than the one merchant processor that doesn't support it, I get DCC prompts every time whether contactless or chip and regardless of the amount when using American cards in the Dominican Republic. Same goes for Apple or Google Pay.

Either way prompts for DCC and then spits out a slip with no signature required for amounts under 10,000 DOP (about 180 USD). Over that, you have to sign the slip but still no difference whether chip or contactless.

95% of the time when the terminal is cashier-facing, they pick DOP without even asking so at least I've got that going for me.