iOS 13 is compatible with several previous generations of iPhone models, and if a new report is to be believed, those phones will get updated to iOS 14 as well.
Apple will reportedly offer iOS 14 updates to all devices running iOS 13. That's according to a report from The Verifier (via 9to5Mac), citing early iOS 14 development code and a source in the system development process.
This report also claims that this will be the last major update that Apple offers for the iPhone 6s, iPhone 6s Plus, and iPhone SE, all three of which are powered by Apple's A9 processor.
For reference, here are all the devices compatible with iOS 13:
The iPhone 6s and iPhone SE are getting a bit long in the tooth at this point, with the former having launched in 2015 and the latter in 2016. It'd be great to see Apple continue to support them with another major iOS update, giving them one more year of new features and making it easier for owners of those devices to continue using them.