This statement is simply a rumor. They has been a lot of speculation that Harry Styles and Emily Ratajkowski are dating after they were spotted kissing out in public. However, neither Harry Styles or Emily Ratajkowski have confirmed the rumor themselves.
Numerous articles address this situation. For example, People magazine wrote, " The 'are they or aren't they' couple has been making headlines since they were spotted packing on the PDA in Tokyo last month. In photos and videos obtained by the Daily Mail, the pair looks super cozy, passionately kissing on the streets in Japan. A source also recently told PEOPLE that the two were 'friendly' before this outing".
People magazine address that the two dating is just a rumor for now, but there is a lot of evidence that may suggest that the rumors are true. However, to know for sure we would need either Style, Ratajkowski, or a member of their team to confirm.
Source: https://people.com/style/emily-ratajkowski-dating-harry-styles-makeout-kissing-tokyo/