I love Mountain Dew Passionfruit although I’ve been told by different people that it isn’t available in the US.
According to Google -
The closest U.S. equivalents to New Zealand's Mountain Dew Passionfruit Frenzy are Mountain Dew Baja Passionfruit Punch (released limited-edition in 2023) and Mountain Dew Baja Midnight (released at Taco Bell in August 2025).