Aside from the ORIGINAL creation of the iPhone, I can't think of a single notable thing they have done in the last 7+ years. Everything they "enhance" on the iPhone are features that are a year behind what was already implemented on Android competition.
A-series processors and A7 onwards especially (IE: 64-bit), Apple Watch, earpods. Short list perhaps, but who seriously innovates majorly in tech anymore? Essentially every device we use on a daily basis are very mature, and have been out on the market either for years and years or even decades.
It's all derivatives of derivatives, with small innovative features tacked on top of what existed before, like Google's AI-driven nightsight camera or whatsitscalled. It was good innovation, but HOW innovative exactly? Not revolutionary probably; phone cameras have existed before it, since more than 15 years in fact, and other phones could also take nighttime pictures, except not quite as good at it perhaps... So how do you quantify innovation? Very hard to do, it becomes more opinion than anything else.
Even the iPhone was an evolution of the Blackberry and Windows Mobile phones. It wasn't something totally new...
Ehhhh... iPhone WAS totally new, though (allowing for the fact other cell phones existed before it, of course.) Nobody had ever done a phone before which was entirely touchscreen-driven, no hardware keyboard, running BSD-derived multitasking OS with full-featured web browser (you remember browsers in phones at the time? Painfully slow, and terrible almost beyond description), and so on.
Smartphones as existed before iphone mattered little fundamentally from any other phone before them which had a dot matrix LCD screen; all cell phones are driven by microprocessors which run software, this goes back to ancient times (which is to say, the 1980s. lol) Oldfashioned smartphones just had (a bit) more processing power and a bit better graphics with bigger screens, more buttons (IE: hardware keyboard) compared to other oldfashioned "dumb" phones. They did not have the well-designed UI/UX which iphone in fact pioneered.