Olivia's new single is called The Cure

From Billboard:

“couldn’t be more excited for you guys to hear it,” Rodrigo added in her caption, noting that the track will drop on Friday (May 22), which, coincidentally, is World Goth Day.

“The Cure” is possibly a nod to the Robert Smith-led iconic goth rock band of the same name, which Rodrigo has said is one of her favorite groups. The feeling is mutual, as Smith has previously praised the High School Musical: The Musical: The Series singer and made a cameo at her Glastonbury set last year.

From Nylon:

"Judging by the little teaser we’ve already gotten, it’s safe to assume the song won’t actually be a reference to Robert Smith and co., but again, we’re willing to give her a pass"