According to the Spanish magazine, ¡hola!, they are in Ibiza, Spain, where they celebrated Olympia's 26nd birthday.This photo would be taken in Ibiza.
https://www.hola.com/moda/actualidad/20220726214337/olympia-de-grecia-look-fiesta-ibiza/
https://www.hola.com/moda/actualidad/20220726214337/olympia-de-grecia-look-fiesta-ibiza/