Not remotely comparable. Ford may not facilitate creating such a radio, but prevent it either. A company could figure out everything and sell a radio to a client without paying Ford or being sold to the customer by Ford or going via Ford at all or even losing warranty.

Ultimately, being a marketmaker comes with responsibilities. If Apple wants to close iPhones and support only Apple software they could do that. But as long as Apple operates an App Store and does not allow other methods of install, this comes with the legal obligation to play fair.