It still gets security updates, just not iOS17 support. My mum is on the 6s with iOS 15 and that still gets security updates. It’s my secondary phone, and in it’s lifetime l’ve had a two Pixels and a Samsung that I had to return for build faults (Pixel) or they stopped doing software updates/security updates.

There are many faults for Apple, but their iOS support can’t compare to any first party Android. iPhone owners don’t NEED to upgrade every two/three years, they do it because they’re dumbasses.