The upcoming Apple iPhone's screen could double-up as a speaker going by the company's patent filing at the USPTO. The patent is not detailed explicitly but does point to hermetic sealing around the device. It also suggests reduction of distortion by ensuring a near-perfect vertical speaker diaphragm motion. While not 100% indicative, there is every possibility of Apple incorporating this technology following in the footsteps of Android phones such as the LG G8 ThinQ.
https://www.notebookcheck.net/The-next-Apple-iPhone-could-sport-a-sound-emitting-display-like-the-LG-G8-ThinQ.411006.0.html