https://wccftech.com/the-first-third-party-mfi-certified-usb-c-to-lightning-cable-has-been-announced/

This was a long time coming and it’s finally here, the first ever third-party USB-C to Lightning cable for iPhone and iPad that is approved by Apple itself.

Though the MFi Program has existed for a long time, but that program did not cover USB-C to Lightning cables at all. Basically, if you ever wanted to fast charge your compatible iPhone or iPad, then you have to buy a cable straight from Apple.