Anker now has a USB type C-to-Lightning cable with MFi certifcation available for pre-order on its website. This cable is 3 feet in length and has TPE shielding for durability and longevity. Anker claims that it can charge an iPhone (8 or later) by as much as 50% in 30 minutes, so long as a USB-PD brick is used.
https://www.notebookcheck.net/Anker-has-launched-its-first-MFi-certified-USB-type-C-cable-for-iPhones.403216.0.html