How to share your audio in iOS 13

Last year, when I was planning to fly to Japan with my fiancée, we downloaded movies to my iPhone so that we could watch them together on the plane. Shortly before we left, though, we realized we wouldn’t be able to use our AirPods on the same phone. Instead, to share audio, we had to cobble together a Lightning-to-headphone jack adapter, a cheap headphone splitter from our local pharmacy, and two pairs of Bose headphones that we borrowed from family. It was a lot of cords — a