MacRumors checked out the Belkin MagSafe Car Charger
A quote from the article:
Though it's been more than two years since the launch of the iPhone 12 lineup with MagSafe technology, the first 15W MagSafe car charger just came out, with Belkin introducing it in early November.Belkin MagSafe Car Charger Review
The Boost Charge Pro Wireless Car Charger with MagSafe is the first magnetic car charger able to charge MagSafe iPhones at up to 15W. There were prior in-car magnetic solutions for MagSafe iPhones, but they were limited to a maximum of 7.5W.