So how is a 3rd party going to give support to a customer with iPhone, if Apple will ban such 3rd party for whatever reason? Let's say that given 3rd party is

So how is a 3rd party going to give support to a customer with iPhone, if Apple will ban such 3rd party for whatever reason? Let's say that given 3rd party is making a device, which can be controlled via Bluetooth from Windows, Android, MacOS and iOS. They don't make any money on any applications, but from the device.