Source: OtterBox
If you're looking for iPhone 12 accessories outside of what Apple is offering, then OtterBox is one of the accessory makers to turn to. Not only did they partner with PopSockets to create cases that have PopTops built-in, but there will also be cases compatible with the iPhone 12's MagSafe magnetic charging system. OtterBox will be releasing its MagSafe-compatible Symmetry Series+ cases soon. If you want to check those out, you can head to OtterBox's site.
Source: Engadget