I don’t know a single bank in Europe that provides this option
Edit: Perplexity says this:
> cards cannot block DCC offers because the merchant terminal identifies your card’s country of origin from the card number and offers DCC accordingly. Always manually decline at payment to let the card handle conversion at better rates
Edit: Perplexity says this:
> cards cannot block DCC offers because the merchant terminal identifies your card’s country of origin from the card number and offers DCC accordingly. Always manually decline at payment to let the card handle conversion at better rates