Will the AirPods Pro work with older iPhones?

Yes, they can! However, it will depend on if your iPhone supports iOS 13. Not sure if your iPhone does? Here’s a list:[1]

Here is a list of other devices that AirPods Pro support:[2]

1. iPhone, iPad or iPod Touch running iOS 13.2 or later.
2. Mac running macOS 10.151 (Mojave) or later.
3. Apple TV running tvOS 13.2 or later.
4. Apple Watch running watchOS 6.1 or later.

BONUS: AirPods 1st or 2nd Gen users, here are devices that are supported:

1. iPhone, iPad or iPod Touch:
   1. AirPods 1st Gen running iOS 10 or later.
   2. AirPods 2nd Gen running iOS 12.2 or later.
2. Mac:
   1. AirPods 1st Gen running macOS Sierra or later.
   2. AirPods 2nd Gen running macOS Mojave or later.
3. Apple TV:
   1. AirPods 1st Gen running tvOS 11 or later.
   2. AirPods 2nd Gen running tvOS 12.2 or later.
4. Apple Watch:
   1. AirPods 1st Gen running watchOS3 or later.
   2. AirPods 2nd Gen running watchOS 5.2 or later.
5. Any non-Apple devices can be connected as a bluetooth headset.
   note: You can’t use Siri, but you can listen and talk. [3]

Footnotes

[1] iOS 13[2] Connect and use your AirPods and AirPods Pro[3] Set up AirPods with your Mac and other Bluetooth devices