Well, this guy just confirmed Leo and Margot Robbie dated 10 years ago... at the beggining of 2013 as we know, and we saw the pics from this trip. I'm trying to paste the story here but it's not working.
Anyway, he basically said that he cooked for Leo and Margot when they spent a week in the island of coco, he says: It was a beautiful expirience, really. The most important thing in this job is your discretion and confidentiality. At the time he was the boyfriend of Margot Robbie, who now became super famous because of the movie Barbie, she was not famous. I didn't take a photo with her. How could I imagine that years later she was going to become really famous?
https://www.crhoy.com/reportaje-especial/la-anecdota-del-chef-tico-que-cocino-para-margot-robbie-y-leo-dicaprio/