Apple will only repair iPhones older than the iPhone 6s if it has the necessary parts. All iPhones that followed those phones should be compatible with Apple. This suggests that while the iPhone 6s may receive software support for a while, it may not be possible to repair it if it breaks. The iPhone 6 is sure to remain in the memory of many Apple users, as it was the company's first smartphone with a considerably larger screen than its predecessors.
The phone was discontinued a few years ago, but it's still receiving security patches and technical support from Apple, perhaps not for much longer. Apple has now added the iPhone 6 to its “old products” list. A rumor from iPhoneSoft, published today, suggests that iOS 13 will interrupt several generations of iPhone. With iOS 12, Apple was compatible with all devices that could run iOS 11, increasing performance on all models starting with the iPhone 5s.
If today's report is to be believed, it's the end of a large portion of active iPhone models. Apple may want to stop supporting 4-inch iPhone screens with iOS 13; ending compatibility with iPhone 5s and SE would be a step forward in that regard. This is because Apple continued to sell the 4.7-inch iPhone 6 for a longer time in some regions after permanently discontinuing the iPhone 6 Plus. Strangely enough, the larger iPhone 6 Plus was already considered a vintage product before the iPhone 6.