https://wccftech.com/magsafe-duo-and-iphone-12-leather-sleeve-are-coming-soon-says-apple/

The iPhone 12 Mini and iPhone 12 Pro Max have finally gone on sale, and just now, Apple's online store has revealed that the MagSafe Duo charger along with Apple's first-party leather sleeve for the iPhone 12 series will be coming soon, and they will be priced at $129 each. Apple previously talked about how they plan on releasing these on a later date, so now that the entire lineup is out, it makes sense to go ahead with the launch.

Regarding the sleeve, this is what Apple has to say.