Just look at Huawei’s trifold phone

Huawei's Mate XT is a unique trifold smartphone with three usable screen sizes: a regular 6.4-inch display, a medium 7.9-inch square shape resembling other foldables, and a fully opened 10.2-inch tablet mode. It costs nearly $4,000 and lacks official Google Mobile Services support, but users can sideload apps to achieve a regular Android experience. The phone feels sturdy despite its complexity, but it is thicker and heavier than average smartphones. Its software future is uncertain as Huawei moves away from Android compatibility.