I ordered and recently received the new Car Vent Mount with MagSafe made and sold by Moment (Lens). Exclusively designed for the new MagSafe technology in the iPhone 12, it has a super strong magnet. It quickly and securely connects with the iPhone. With MagSafe no special case is required for use.
This is the second car vent mount with magsafe that I’ve used and it is far superior. At this point I can say it is the best MagSafe vent mount available. I absolutely love it and won’t even consider another one. It has yet to even wiggle when driving on bumpy roads much less slip or fall off (as has happened with competitor products).
Moment sells the mount for $40 on their website (https://www.shopmoment.com/products/car-vent-mount-for-magsafe/). It’s currently out of stock but you can get it on back order – current wait time is approximately 4 weeks.