This means that iOS 18 is the final software version that supports the iPhone XS, iPhone XS Max, and iPhone XR, although those devices will continue to receive important security updates from ...

The ‌iPhone‌ XR, ‌iPhone‌ XS, and ‌iPhone‌ XS Max all have an A12 Bionic chip, so it looks like iOS 19 will discontinue support for that chip.