Reportedly, Apple is working on two devices with foldable displays, starting with a foldable iPhone. Originally tipped to launch in 2023, Apple's first foldable device is now thought to be arriving two years later. Meanwhile, Apple is also developing a foldable MacBook with a 20-inch display, which could launch towards the end of the decade.
https://www.notebookcheck.net/Apple-MacBook-with-a-20-inch-display-planned-as-foldable-iPhone-slips-until-the-middle-of-the-decade.602277.0.html