Punch out a hole in the display, add an extra camera on the back, do the mandatory yearly updates to the internals and you'd end up with a Samsung Galaxy S10+ - that is, if you started out with an S9+ if it wasn't obvious. Only that would be oversimplifying it, and we'd rather explore the nuances.
Source: https://www.gsmarena.com/samsung_galaxy_s10_plus-review-1901.php
