What makes an iPhone accessible? Mostly, it’s the software: the operating system and apps that follow guidelines Apple has set for that purpose. If new hardware plays a role, it’s often in the opposite direction. For some with hearing or vision disabilities, the loss of the Home button has made hanging onto an iPhone SE feel worth the struggle. But this year, there’s another hardware story (and I’m mighty surprised to be writing this): What’s inside Apple’s Pro iPhones is giving an important boost to usability for people with disabilities. The number and breadth of accessibility features you can quickly…