There's another entrant in the flip space, however, and that's Motorola. And if Oppo and Samsung were feeling pretty good about themselves up until this point, well, just look at this.
Motorola Razr 2023 leaked renders
The renders above come straight from leakster legend Evan Blass, aka @evleaks, and, as you can see, show an absolutely humongous outer screen on the upcoming Motorola Razr 2023. It looks like almost that entire slice of the phone is taken over by the display, which even has cutouts for the two cameras and the LED flash.
It's taken slab-style phones a very long time to be practically all-screen, but it looks like flip-style foldables have no intentions of dragging things along as much. With this design, Motorola clearly wins the outer screen size competition. Your move, Oppo. Your move, Samsung.