It’s been there since literally iPhoneOS 1.0. They are calling it “share” now, but really it’s always meant “put / send this somewhere”. The difference with recent versions of iOS is that the share button is no longer always visible but you need to press the ellipses button to reveal it. It’s there along with all the other dastardly actions Apple doesn’t want you to know about, such as “Add to Favourites”.